Seth, the Mad

Menace, Indestructible
Seth, the Mad isn't a creature unless you have discarded a card this turn.
Each nonland card you own has madness. The madness cost is equal to its mana cost. (If you discard a card with madness, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)
When Seth dies or is exiled, return it to its owner's hand at the beginning of the next end step, then Seth's owner discards a card at random.
Madness {1}{b}{r}