Tiamat [The List] 2 - 8 player Discard a card with converted

Discard a card with converted mana cost X: Counter target spell with converted mana cost X

On some cards

Set: Dungeons & Dragons: Adventures in the Forgotten Realms Promos Type: Legendary Artifact — Rarity: Mythic Cost: {5} {2}

but smiling is easier on the granite

Set: The List Type: Artifact Rarity: Rare Cost: {3} You may activate abilities of creatures you control as though those creatures had haste

Tiamat [The List] 2 - 8 player Discard a card with convertedSet: The List Type: Legendary Creature Dragon God Rarity: Mythic Cost: {2}{W}{U}{B}{R}{G} Flying When Tiamat enters the battlefield, if you cast it, search your library for up to five Dragon cards not named Tiamat that each have different names, reveal them, put them into your hand, then shuffle. "My children will rule over all!"