Set:	Secret Lair Drop Series
Type:	Legendary Enchantment Background
Rarity:	Mythic
Cost:	{2}{B}

Commander creatures you own have "Whenever this creature becomes tapped, it and other creatures you control that share a creature type with it each get +2/+0 and gain undying until end of turn." (When a creature with undying dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.)