Tiamat (Borderless Alternate Art) [Dungeons & Dragons: Adventures in the Forgotten Realms] Dragon Wurm and it's returned from the

and it's returned from the battlefield to its owner's hand at the beginning of the next end step

where X is that artifact's mana value

Like Vast: The Crystal Caverns

As they find clues

Tiamat (Borderless Alternate Art) [Dungeons & Dragons: Adventures in the Forgotten Realms] Dragon Wurm and it's returned from theSet: Dungeons & Dragons: Adventures in the Forgotten Realms 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!"