Regeneration [Limited Edition Beta] Ninth Edition Scholars say that arbiters exist

Scholars say that arbiters exist on every world

A keepsake for Vraska

{4}: Remove a doom counter from Armageddon Clock

Whenever you tap a land for mana

destroy target creature with a -1/-1 counter on it

Regeneration [Limited Edition Beta] Ninth Edition Scholars say that arbiters existSet: Limited Edition Beta Type: Enchantment Aura Common Cost: {1}{G} Enchant creature (Target a creature as you cast this. This card enters the battlefield attached to that creature.) {G}: Regenerate enchanted creature. (The next time that creature would be destroyed this turn, it isn't. Instead tap it, remove all damage from it, and remove it from combat.)