Every distinct wording since 2010, newest first.
September 19, 2025 · Marvel's Spider-Man
“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.