Armor-Piercing Question: Eve warns Mark that revealing his alter ego to Amber is a sign that he wants a serious relationship with her, given the risks of being a superhero. She asks Mark if he's ready for that, but he has no definitive answer, leaving him to keep it, and his Mars mission, a secret from Amber.
Banishing Ritual: Cecil and Donald use this to send Damian Darkblood back to Hell so that he won't risk provoking Nolan into taking drastic measures too early and so they can covertly investigate Nolan's motive for killing the Guardians and figure out the means to fight him when the time comes.
Did You Just Flip Off Cthulhu?: Zigzagged during a conversation between Nolan, a super powered alien, and Damian Darkblood, a demon detective. Nolan threatens Damian to stay clear of him and his family. Damian is aware that Nolan can kill him easily, but responds that Debbie is already suspicious of Nolan, and there is a chance Mark will follow. Nolan, with no other counter, just tells Damian this:
Everyone Has Standards: Robot warns Rex about his mixing his personal life with his hero profession, and implies that he would do the same with Monster Girl. While Rex tries to justify that he is entitled to go with any girl he wanted, he flat out states that he draw a line at MG anyway because he can't risk dating/banging someone that looks like a child.
Everybody Knew Already: Cecil already has suspicions about Nolan's being directly responsible for the original Guardians' deaths, and wants to know why before he decides his next course of action. Unfortunately for Darkblood, Cecil banishes him because he knows too and risks outing his information at the worst time.
Failed a Spot Check: Mark volunteers to keep an eye on the crew traveling to Mars, but falls asleep. He then wakes up to find they have all disappeared and searches for them.
Hope Spot: The Mars Mission goes south, but Invincible manages to help the space crew escape from the Martians... or so he thought. As the Martians feared, the Sequids they contained possesses one of the humans and seemingly wipes them out with the swarm. One sole Martian escapes, impersonating the human that was left behind when the crew returns.
Immune to Mind Control: Humans don't have this against Sequid possession. The immune Martians are a bit suspicious about Invincible being unaffected. Of course, Mark is only half-human, so his Viltrumite blood enforces this on him.
Ironic Echo: When he was investigating Guardians HQ, Damien Darkblood responded that he "Wasn't hiding" when called out by Cecil. Cecil throws this right back at him nearly verbatim when surprising Darkblood at the Grayson house while doing more investigating.
Skewed Priorities: Nolan asks Debbie to trust him, ignoring a monster attack behind him. Even after she says yes and asks him to take care of the attack, Nolan decides to let Cecil "earn his paycheck" since he's on vacation with his wife.
Sufficiently Analyzed Magic: Damian is initially confident that the only way to banish him was destroyed long ago. Cecil then reveals they recovered the fragments of the spell and were able to reconstruct the missing parts using machine learning.
You Have Outlived Your Usefulness: Cecil has Donald banish Damian Darkblood back to Hell when the latter refuses to stop investigating the Grayson house. Since Darkblood's continued presence runs a risk of getting on Omni-Man's bad side too soon, Cecil decides he is no longer needed.
