Regeneration [Beta Edition] Crab Beast Set: Amonkhet Prerelease Promos Type:

Set: Amonkhet Prerelease Promos Type: Instant // Sorcery Rarity: Rare Cost: {1}{W} // {3}{G} Untap target creature

While it's true that a quillspike does heal the sick

Set: Magic 2013 Type: Sorcery Rarity: Rare Cost: {3}{G}{G} Creatures you control get +3/+3 until end of turn

Set: Tenth Edition Type: Artifact Rarity: Rare Cost: {5} {5}

her "improvements" to them make her as feared by allies as by enemies

Regeneration [Beta Edition] Crab Beast Set: Amonkhet Prerelease Promos Type:Set: Beta Edition Type: Enchantment Aura Rarity: 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.)