The vampiric discipline of supernatural strength, from White Wolf Game Studios' Vampire: The Masquerade role-playing game. Vampires with this discipline are able to punch through walls, lift cars, pick up normal humans one-handed by the collar, and perform similar physical feats (strength increasing with higher levels of Potence, of course). In the Mind's Eye Theatre version of the rules, high-level Potence creates other strange effects, which of course are copyrighted material and won't be discussed here. Go read the Mind's Eye Theatre Guide to the Camarilla.

Potence has absolutely nothing to do with soy.