702.187. Mayhem

Mayhem is a static ability that functions while the card with mayhem is in a player’s graveyard.

“Mayhem [cost]” means “As long as you discarded this card this turn, you may cast it from your graveyard by paying [cost] rather than paying its mana cost.” Casting a spell using its mayhem ability follows the rules for paying alternative costs in rules 601.2b and 601.2f–h.

“Mayhem” without a cost means “You may play this card from your graveyard if you discarded it this turn.”