Essence Warden [Mystery Booster] Spirit {T}: Put a matrix counter

{T}: Put a matrix counter on target creature and that creature gains "Remove a matrix counter from this creature: Regenerate this creature

Set: Kaladesh Inventions Type: Legendary Artifact Rarity: Mythic Cost: {0} Metalcraft — {T}: Add one mana of any color

Set: International Collectors’ Edition Type: Artifact Rarity: Uncommon Cost: {1} You have no maximum hand size

Set: Magic Player Rewards 2004 Type: Token Creature — Angel Rarity: Common Flying

if you have less [Life] than your opponent

Essence Warden [Mystery Booster] Spirit {T}: Put a matrix counterSet: Mystery Booster Type: Creature Elf Shaman Rarity: Common Cost: {G} Whenever another creature enters the battlefield, you gain 1 life. "The more our numbers grow, the more I gain hope that Volrath and his cursed stronghold will one day fall." Eladamri, Lord of Leaves