- Your left hand has become unusually large (Dx:-3 St:+5 To:+2 Ap:-4): Think Hellboy. Grants the ability to wield two-handed weapons in just the left hand, freeing up the right hand for other weapons or shields. Note that it's the left hand, and thus experiences left-hand penalties, and that bearing a two-handed weapon in the right hand still blocks the left hand from being used for something else. Useful when fighting bare-handed.
There are no left-handed penalties at present, except for a few very special cases (Rolf's set). Personally, I think this sort of corruption would be way too good. It would probably be worthwhile to scum corruption traps to get this, even if you picked up a couple bad ones along the way. The wall walking corruptions some people are suggesting are probably similarly worth scumming for.
Hoping to win with every class, doomed. Archer, Barbarian, Bard, Beastfighter, Druid, Elementalist, Farmer, Fighter, Monk, and ULE Priest down.