MTG >Combos >Card with Free Sacrifice ability +Skullbriar, the Walking Grave +Athreos, Shroud-Veiled +

Skullbriar keeps counters placed on it regardless of the zone it's in. When a creature dies, Athreos puts a coin token on the creature and returns it to the battlefield. Skullbriar becomes an infinite sac outlet, as it will always have a coin token.