Olag and Miau, New Friends is a rare Legendary Creature — Zombie Cat card from Mystery Booster: Commander Edition (MBC), collector number 48.
Whenever another Zombie you control enters, put a +1/+1 counter on target Cat you control. Whenever another Cat you control enters, put a +1/+1 counter on target Zombie you control. At the beginning of your end step, each opponent loses life equal to the number of tapped Cats and/or Zombies you control.