Abominable Mushroom Monster

Soulbond (You may pair this creature with another unpaired creature when either enters the battlefield. They remain paired for as long as you control both of them.)
As long as Abominable Mushroom Monster is paired with another creature, each of those creatures has Abyssal (While this creature is in play creatures cannot gain +1/+1 counters and cannot lose -1/-1 counters).