Rimuru consuming Veldora and the Unlimited Imprisonment all in one gulp. It is as absurd as it is incredible, that he devoured a Physical God and the prison in what could only be described as an instant.
The battle with Ifrit full stop. The spirit puts up an amazing fight with Rimuru, Ranga and the fools of Blumund, and would have won if Rimuru didn't have 'thermal resistance'.
In spite of being a Wake-Up Call Boss and Rimuru's first real fight, the Orc Disaster still doesn't even land a single hit on him.
Starved vs Predator: The fight between two great creatures of gluttony, with the winner determining the fate of the forest. Concept itself is awesome.
The absolute curb stomp Rimuru gives out to the Kingdom of Farmus. He only spared a couple of lives, including the king, just to show how much King Edmalis royally screwed up in angering him.
Not just Rimuru, everyone who is capable of fighting also delivered their own sense of justice. Under normal circumstances, it shows that the Kingdom of Farmus never stood a chance against Tempest, even with their three trump cards; they were doomed from the start.
Bennimaru single-handedly destroys one of the enemy camps by himself.
Gabiru dispenses with his usual ego and demonstrates that he and his men are fearsome dragonnewts by bombarding another enemy camp, with an equal amount of Dragonnewts to the enemy soldiers, from the skies with their fire breath before Gabiru destroys what remains with a Vortex Crash.
Souei and his squad assassinate yet another camp, with Souka commenting afterward that they overestimated them. The Temple Knights didn't even have a chance to utter a word.
Gobta and Rigur literally run circles around the west camp's army, hacking down church soldiers one by one.
Hakuro has a rematch with Kyouya and proves that the only thing that the arrogant Otherworlder had going for him the last time was that Hakuro was handicapped. At full power, Hakuro easily moves so fast that Kyouya can't keep up, even with perception at least x300 times faster than a normal person, parries everything thrown at him, and beheads his opponent with one decisive strike.
Geld fights Shougo with a brutal combination of both heavy defense and his Corrosion skill, in order to quickly incapacitate his opponent for a swift death. When Shougo responds to this and Kyouya's death by killing Kirihara for the Survivor skill, which gives him a Healing Factor and improved defenses, the enraged Geld forgoes the quick death in favor of giving his opponent a brutal No-Holds-Barred Beatdown, letting Shougo's new skill heal him in order to prolong to beatdown. By the end of it, Shougo is begging for mercy and is only saved from his death by the arrival of Razen.
Megiddo. It's basically the Archimedes death ray made real. What it does is create water lenses high up in the air, and smaller droplets closer to the ground. The larger lenses concentrate sunlight into a laser, which fires down to the earth and is redirected into its target by bouncing off the smaller droplets. Each laser can only kill one or two people at a time, but just one is enough to kill a person as powerful as the Orc Disaster, and the lasers just keep raining down. The manga depicts the lasers raining down pretty much all at once and annihilating the army, while the anime takes it slower and invokes Bloodless Carnage to demonstrate just how cleanly each laser makes its kill, all the while Rimuru just floats above and Great Sage counts the kills, making it less like "calamity" and more like God passing Judgement on the deluded souls who pissed him off.
Milim Nava gets to show off she was serious about showing "restraint" when she defeated Charybdis by what she does to the Beast Kingdom. After a brief fight with fellow Demon Lord Carrion, Carrion assumes his Super Mode and launches his strongest attack, engulfing Milim in an explosion. She flies out visibly undamaged now in her own Super Mode, appearing as a dragon-winged Black Knight, and comments it's been awhile since she's taken an attack that could make her arm go numb before unleashing Dragon Nova and obliterating not just Carrion's capital, but several mountains in the path of the shot. Carrion is so horrified by the devastation that when fellow Demon Lord Frey appears behind him with a knife to his neck, he doesn't have the will to resist.
The "fight" between Clayman's army versus the alliance of Tempest and Yuurazania is a total victory on the part of the latter thanks to Benimaru's tactics. Even though they have the sheer numbers and quality of troops to win a straight fight, Benimaru takes full advantage of their knowledge of the terrain alongside the strengths of his men to completely win the fight before it even begins.
First, they wait until Clayman's army travels through a canyon while they set themselves up around the edges. Then, Geld is given the order alongside his High Orcs to cause a massive earthquake that sends most of the army tumbling into pits and incapacitating many.
Then, the main army marches in to start the mop up. The enemies that attempt to fly out of the holes and canyon are then swiftly met and defeated by Gabiru, his dragonewts, and the flying Beastmen. Those who struggle out of the pits by climbing are swiftly dealt with by the waiting fighters. The rout is so swift that they effectively defeat and capture the bulk of the army within minutes of engagement.
Even the enemy commander Yamza realizes the war is already lost and tries to bid a hasty retreat. Instead, he's interrupted by Beastketeer Albis, who swiftly cuts off his teleportation and deals with his guard before engaging him in a duel. Yamza attempts a sneak attack by using his remaining men as a distraction, but who should achieve the save but Gobta, who then proceeds to counter and dodge several more of Yamza's moves before leaving the rest of Albis.
Props to Yamza for not taking Gobta lightly, especially since he had no intel on him in the first place, so deducing that he was an enemy commander and going straight for the kill shows exactly why Clayman recruited him in the first place.
Albis herself proceeds to show why she's the leader of the Three Beastketeers by mocking Yamza's "trump card", before going One-Winged Angel and easily defeating him and the rest of his men with powerful bolts of lightning that turn the targets to stone that shatters or melts them into goo.
Finally, there's Benimaru himself revealing how far he's come when he proceeds to one-shot the Yamza-made Charbydis (the very same monster that once fought all of Tempest to a draw) with a single Hell's Flare, which ends with the monster basically imploding. Even if though it's noticed to be weaker than the original, its very appearance on the battlefield is enough to make everyone else freak out and call for a truce in fighting.
Shuna vs Adalman. The oni princess shows how far she's come by matching the spells of the ancient lich while calmly picking at his self-loathing mindset, culminating in Adalman launching Disintegration (the same spell Hinata nearly killed Rimuru with) before Shuna uses Overdrive to usurp control of the spell and repurpose its power into one that frees the undead army from Kazaream's ancient curse, earning their loyalty to Tempest.
The long-awaited showdown with Clayman is just made of win.
Shion opens it by landing Rapid-Fire Fisticuffs on Clayman while he can only scream in pain and rage. Sure, he heals it over, but it's the first break in his confidence.
Milim vs Rimuru, finally having a "proper" fight. Rimuru spends most of it just jumping around and constantly shifting between slime and humanoid form to avoid Milim's strikes, which are so strong his body deforms from grazing shots and so fast she keeps Flash Stepping all over the place while he can barely keep pace with all his observational abilities working overtime.
Beretta vs Viola: More funny than awesome, but Beretta had the easiest time with his opponent, having crushed Viola in record time and was already neatly disassembling her for spoils of war while everyone else had looked away.
Milim vs Veldora, having two of the canonically strongest people in this verse finally going at it. Even if it's revealed they were just "playing" since Milim was simply Pretend to Be Brainwashed while Veldora recognized this, it's still telling these two titans unleash powerful attacks against each other without hesitation. Special points go to Veldora using various Street Fighter and Dragon Ball attacks against Milim, who without fail manages to block, dodge, deflect, or outright No-Sell all of them.
Shion vs Clayman, which can be summed up as Shion No Selling every single one of Clayman's bags of tricks before he finally goes One-Winged Angel and goes utterly berserk on her, only for her to calmly outmatch even that before eventually slicing off all of his arms.
Rimuru vs Clayman: It opens with Rimuru doing something beyond ballsy; stealing Guy Crimson's Barrier skill to trap Clayman and himself in it, which Guy can only find amusing. Then when Clayman uses his [Demon Blaster] attack, Rimuru simply has [Beelzebub] devour it. Clayman begins running his mouth only for Rimuru to show his displeasure while subjecting Clayman to a brutal No-Holds-Barred Beatdown and a personal hell though a forced [Thought Acceleration]. After all that Clayman himself gets devoured shortly after. All this underscored by the intro music of the second half of series 2 "Like Flames" playing throughout the entire sequence. A glorious way to induct Rimuru into the Demon Lords Council.
Rimuru does something the other demon lords couldn't do: come up with a name for the group. Sure, it is funny that there were multiple Walpurgis banquets to determine it, but the fact he dropped the name so easily shows that he has had more than enough practice in naming things.
