Iron Star (250) [Limited Edition Alpha]Set: Limited Edition Alpha Type: Artifact Rarity: uncommon Cost: {1} Whenever a player casts a red spell, you may pay {1}. If you do, you gain 1 life.

double strike

Set: Coldsnap Promos Type: Creature — Elf Warrior Rarity: rare Cost: {5}{G}{G} You may exile two green cards from your hand rather than pay this spell's mana cost

Set: Limited Edition Beta Type: Enchantment — Aura Rarity: uncommon Cost: {W} Enchant land Enchanted land has indestructible and can't be enchanted by other Auras

Set: The Lost Caverns of Ixalan Promos Type: Land Rarity: mythic As this land enters

Then if this enchantment has no hope counters on it

you may pay {0} rather than pay the mana cost for a colorless spell you cast from your hand

Set: Foreign Black Border Type: Instant Rarity: uncommon Cost: {U}{U} Counter target spell

you gain that much life

Set: Introductory Two-Player Set Type: Creature — Elf Archer Rarity: rare Cost: {1}{G} First strike

Set: Adventures in the Forgotten Realms Promos Type: Legendary Creature — Zombie Wizard Rarity: mythic Cost: {2}{B} When Acererak enters

It phases in before you untap during your next untap step

or Clue Enchanted permanent is a colorless Clue artifact with "{2}