Avacyn, Angel of Hope [From the Vault: Angels] Emblem Benalia has a complex caste

Benalia has a complex caste system that changes with the lunar year

destroy this card unless you send 1 "Iron Core of Koa'ki Meiru" from your hand to the Graveyard or reveal 1 Dragon-Type monster in your hand

Set: Visions Type: Sorcery Rarity: Rare Cost: {2}{G}{G} As an additional cost to cast this spell

Your opponent randomly selects and discards 1 card from his/her hand and then selects and discards another card from his/her hand

Set: Enemy of Justice Card type: Counter Trap Rarity: Ultimate Rare Negate the Normal Summon or Flip Summon of a monster and return the monster to its owner's hamd

Avacyn, Angel of Hope [From the Vault: Angels] Emblem Benalia has a complex casteSet: From the Vault: Angels Type: Legendary Creature Angel Rarity: Mythic Cost: {5}{W}{W}{W} Flying, vigilance, indestructible Other permanents you control have indestructible. A golden helix streaked skyward from the Helvault. A thunderous explosion shattered the silver monolith and Avacyn emerged, free from her prison at last.