
TrampleTrampleExcess combat damage it deals to a blocker carries over to the player or planeswalker it's attacking.
When Carnage enters, return target creature card with mana valuemana valueThe total amount of mana in a card's cost, ignoring colour. A card costing has mana value 4. X counts as 0 except on the stack. 3 or less from your graveyard to the battlefield. It gains "This creature attacks each combat if able" and "When this creature deals combat damage to a player, sacrifice it."
MayhemMayhemYou may cast this card from your graveyard for if you discarded it this turn. Timing rules still apply.
Hover an underlined rule to see what it means.
Read from the rules text. A card that enables a keyword makes or is the thing; a card that rewards it gets better when you have it. Two cards interact when one enables what the other rewards.