Spawn of Mayhem (Promo Pack) [Ravnica Allegiance Promos] Phenomenon during damage calculation (Quick Effect):

during damage calculation (Quick Effect): You can make this card's ATK/DEF become equal to the ATK of the monster on the field with the highest ATK (your choice

It has "Sacrifice this creature: Add {C}

except "Soul Servant"

Set: Diamond & Pearl: Legends Awakened Type: Psychic Rarity: Rare Retreat cost: Colorless

Spawn of Mayhem (Promo Pack) [Ravnica Allegiance Promos] Phenomenon during damage calculation (Quick Effect):Set: Ravnica Allegiance Promos Type: Creature Demon Rarity: Mythic Cost: {2}{B}{B} Spectacle {1}{B}{B} (You may cast this spell for its spectacle cost rather than its mana cost if an opponent lost life this turn.) Flying, trample At the beginning of your upkeep, Spawn of Mayhem deals 1 damage to each player. Then if you have 10 or less life, put a +1 +1 counter on Spawn of Mayhem.