Similarly, Episode 8 - the series' most bittersweet - has this:
Kamina: "We brawlers are sustained by willpower! Even when mocked as reckless and crazy!
Simon: If there's a wall in our way, then we smash it down! If there isn't a path, then we carve it out ourselves!
Both: The magma of our souls burns with a mighty flame! Super Ultra Combining, Gurren Lagann!
Simon: JUST WHO!
Kamina: IN THE HELL!
Both: ...DO YOU THINK WE ARE?!
Bonus points to Kamina for having badassed himself back to life in order to deliver this speech. A nearby volcano spontaneously exploded right after they finished their speech, as if saying "Word."
Also "My drill is the drill that will pierce the heavens." By the last episode, it decides to create them instead for some reason.
Every time Roger Smith powers up The Big O, the internal display flashes the message "Cast in the name of God, ye not guilty".
The titular Devil Hunter Yohko
"I hold no enmity against those coerced into evil, but to those vile beings who toy with the hearts and souls of men, since the time of ancient gods, we have been your destroyers! Now the 108th Devil Hunter Yohko is here!"
I am the bone of my sword. Steel is my body, and fire is my blood. I have created over a thousand blades. Unknown to death. Nor known to life. Have withstood pain to create many weapons. Yet, those hands will never hold anything. So as I pray, Unlimited Blade Works.
Then there's the literal translation as opposed to the official Engrish:
His body is made out of swords. His blood is of iron and his heart of glass. He survived through countless battles. Not even once retreating, Not even once being understood. He was always alone. Intoxicated with victory in a hill of swords. Thus, his life has no meaning. That body was, certainly made out of swords.
Later adopted by Shirou:
"I am the bone of my sword. Steel is my body, and fire is my blood. I have created over a thousand blades. Unaware of loss. Nor aware of gain. Withstood pain to create weapons, waiting for one's arrival. I have no regrets, this is the only path. My whole life was Unlimited Blade Works."
His body is made out of swords. His blood is of iron and his heart of glass. He survived through countless battles. Not even once retreating. Not even once being victorious. The bearer lies here alone. Forging iron in a hill of swords. Thus, my life needs no meaning. This body is made out of infinite swords.
And finally, used by Kotomine as a similar spell invocation:
"I will kill. I will let live. I will harm and heal. None will escape me. None will escape my sight. Be crushed. I welcome those who have grown old and those who have lost. Devote yourself to me, learn from me, and obey me. Rest. Do not forget song, do not forget prayer, and do not forget me. I am light and relieve you of all your burdens. Do not pretend. Retribution for forgiveness, betrayal for trust, despair for hope, darkness for light, dark death for the living. Relief is in my hands. I will add oil to your sins and leave a mark. Eternal life is given through death. — Ask for forgiveness here. I, the incarnation, will swear. — Kyrie eleison".
The chant to Archer's ultimate technique:
Spirit and technique, flawless and firm, Our strength rips the mountains, Our swords split the water, Our names reach the imperial villa, The two of us cannot hold heavens together —Two great men, sharing a life!
We ask o' thee: Whit art thou? We are Iscariot, the Zealot Judas! In that case, Iscariot, we ask o' thee: Whit dost thou hold in thy right hand? Daggers and poisons! In that case, Iscariot, we ask o' thee: Whit dost thou hold in thy left hand? Thirty silver pieces and a rope! In that case, Iscariot, whit art thou? As apostles, yet not as apostles. As adherents, yet not as adherents. As believers, yet not as believers. As traitors, yet not as traitors. We are disciples of death, the Death Disciple Group, Only bowing and praying forgiveness of the Lord; Only bowing and defeating the enemies of the Lord. Wielding our dagger in the night and poisoning the evening meal, We are assassins; the Assassin Judas. When the time comes, we shall cast our thirty silver pieces at the altar And hang thy head from our rope. Thereby we shall fall to Hell in cabal. Lined up in square formation, we seek to do battle with the 7405926 demons of Hell. APOCALYPSE NOW!
Rip van Winkle also uses one:
Tinker, Tailor, Soldier, Sailor. My bullets punishes all without distinction!
Or even the creed of Hellsing themselves
In the name of God, impure souls of the living dead shall be banished into eternal damnation. Amen.
Or the title quote of Hellsing Ultimate, which later turns out to be one of these. Though it makes little sense out of context (and only half IN context), it probably still counts.
The bird of Hermes is my name, eating my wings to make me tame.
Busou Renkin gives us a badass creed for a rather pathetic organization, the L.X.E. In call-and-response form, as it's also the sign-countersign password:
"From the earth?" "A base metal." "From the sky?" "Fire." "From my veins?" "Hot blood." "The fate of the world..." * Dramatic pose* "Is on my back!"
Justin Law has one that gets recited before his Law Abiding Silver Gun attack:
"We, the people of the city of death, beseech you, our God, as Christ is just Oh God, let me be an instrument of your peace I am a pillar of justice A blade of faith In the name of the father, and of the son, and of the holy spirit "Law Abiding Silver Gun"
"Noir. It is the name of an ancient fate. Two maidens who govern death. The peace of the newly born, their black hands protect." "Noir. It is the name of an ancient fate. Two maidens who govern death. To the depths of Hell's fire, their black souls lure the lost children." "Noir. It is the name of an ancient fate. Two maidens who govern death. To ward the darkness from the nursing babes, their black robes serve as shields."
"We are the Magius. We govern the world from the shadows."
Saiyuki used an interesting one in the promos and trailers of the English dub, taken from the Chin Yisou episodes. It's an explanation of "muichimotsu," "hold nothing," and something Sanzo's master taught him.
If you meet the Buddha, kill the Buddha. If you meet your father, kill your father. Free of everything you are bound by nothing, live the life that is given to you.
There's also one chant that Soul Reapers say before going into battle that has fallen out of style, but Renji has everyone do it when Ichigo's group invades Las Noches:
As we approach the crucial battleground ... Believe... that our blades will not shatter! Believe... that our resolve will not weaken! Though our paths may diverge, our iron hearts willl remain together! Swear... that though the land itself should break asunder... we will... come back here... ALIVE!!
Two members of the 11th Division, the division known as the most bloodthirsty and combative, gave a glimpse into 11th Division sparring rules. saying them together. "The loser goes to get the booze, and the winner takes a break while waiting. If you hold back, I'll kill you!"
Zangetsu constantly reminds Ichigo, "Abandon your fear. Look forward. Move forward and never stop. Retreat and you age. Hesitate and you die."
They're only badass if they mean it. In Rurouni Kenshin, Saitoh Hajime has one of these:
Signum: We are the the guardian knights who gather before our mistress, she of the night sky.
Shamal: As long as our mistress exists, our souls will never extinguish.
Zafira: As long as we have life in our bodies, we will stand by each other.
Vita: We will always exist before our mistress, Queen of the Night Sky, Yagami Hayate.
Hayate: Light of the Night Sky, come to my hand! Blessed Wind Reinforce! Set Up!
Said creed also serves as an extremely epic announcement of the Queen of the Night Sky's (that is, Post-Unison Hayate) first arrival to the material plane, which also doubles as her Awesome Moment of Crowning of sorts. A bit of Fridge Brilliance there, as royalty usually sends heralds before them to announce their presence.
Nanoha herself has a creed. It was assumed at the beginning of the series that she had to say it as a password in order to activate Raising Heart and don her barrier jacket, but soon her talent allows her to activate it without a password. Nevertheless, here it is:
I am the one who has been given a mission. Under the contract, release those powers onto me. Winds to the sky, stars to the heavens. And, the unyielding soul, to this heart! Magic to these hands. Raising Heart, set up!
Goku: You can destroy whole planets but you can never destroy what I am, friend!
Freiza: You... what are you?!
Goku: I am the hope of the universe! I am the answer to all living things that cry out for peace! I am protector of the innocent! I am the light in the darkness! I am Truth! Ally to good, nightmare to you!
The version in the redub Dragon Ball Kai is better (and also the first time Goku uses his full name in an English dub):
Goku: I'm a proud Saiyan who calls Earth home, and I'm here to defeat you. I am the warrior you've heard of in legend, pure of heart and awakened by fury, that's what I am. I AM THE SUPER SAIYAN, SON GOKU!
Goku: The killing stops here. All you can see is the light shining through the cracks around the edges of the door, Baby. And you just don't think that little bit of light can overcome your dark plans. But what you can't see is what's behind the door. That's what I am. ... Light breaks the darkness. This form is my instrument. I have no limits.
Baby: What ARE you?
Goku: I am the answer. The answer to all that is evil.
In the manga series Code:Breaker each member of the eponymous group has their own personal version of the Code of Hammurabi, which they all use as their Creed, and also gives insight to each of their personalities
Oogami's as well as the ones the Angels use later on in the manga to seduce those that'd lost loved ones to evil
An Eye for an Eye, a Tooth for a Tooth, and Evil for Evil
An Eye for an Eye, a Tooth for a Tooth, and the Steel Hammer of Justice for Evil
An Eye for an Eye, a Tooth for a Tooth, and the Requiem of Fury for Evil
An Eye for an Eye, a Tooth for a Tooth, and the Eternal Shackles for Evil
An Eye for an Eye, a Tooth for a Tooth, and the Eternal Sleep for the Dead
An Eye for an Eye, a Tooth for a Tooth, and the Punishment of Death for Evil
An Eye for an Eye, a Tooth for a Tooth, and the Image of Retribution for Evil
Ergo Proxy has Vincent Law's, said by Proxy One near the beginning of the series, and then finally by Vincent himself as the last line of the series:
I am Ergo Proxy - the agent of death.
In Girls und Panzer, Shiho Nishizumi, mother of Miho and Maho, sums up her family's philosophy on tankery.
Shiho: "If you shoot, you hit, if you defend, you defend strong, if you advance, you advance without falter. Iron rules and a heart of steel. That is what defines the Nishizumi school."
In a flashback in the Little Army prequel manga, Maho tells this to Miho.