Decay

Whenever this creature attacks: give an opponent’s creature a Decay Aura counter. At the start of an opponent’s turn: if they control a creature with a Decay Aura counter, give all creatures within 1 card’s length of those that have this token a -1/-1 counter, including itself. {flavor}This card can only be used if both players have a standard-size playmat. While this card is in play, no creatures may overlap.