Truth, Chaos Conduit

Wild Magic Surge — Whenever you cast your second spell each turn, roll a d20.

1 | Truth deals 1 damage to itself.
2-10 | Truth deals 1 damage to a creature chosen at random.
11-19 | Truth deals 2 damage to a creature you don't control chosen at random.
20 | Truth deals 5 damage to a creature you don't control chosen at random.

"I think that might have backfired in the most literal sense possible."