Regeneration [Beta Edition] Modern Masters 2017 Hunting Grounds has "Whenever an

Hunting Grounds has "Whenever an opponent casts a spell

Landfall — Whenever a land enters the battlefield under your control

”—Ertai

damage that would reduce your life total to less than 1 reduces it to 1 instead

but volunteers are divided

Regeneration [Beta Edition] Modern Masters 2017 Hunting Grounds has "Whenever anSet: 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.)