What mechanic lets you scale might to obscene levels?

[Vyss A'lare]

Had over 11000% might one game but I can't for the life of me figure out how to replicate.

[Morkonan]

New player here, but what about "Limit Break?" There are also some weapons that don't scale with certain things, but some that certainly do. Synergies are a big deal, as well. I don't know specifically about "might," but I evolved all six weapons in a run and was basically clearing screens.

Several mechanics you may have overlooked, here: https://vampire-survivors.fandom.com/wiki/Might

Not quite on "Might," but: https://vampire-survivors.fandom.com/wiki/Limit_Break

[Matthew]

It was probably Eskizzibur with divine bloodlines. That sword does retaliation damage. If you kill an enemy with retaliation damage with bloodlines, you gain permanent max health. You also gain % might from portion of missing health. The more enemies you kill with Eskizzibur, the more hp or might you gain.