Tiamat (Showcase) [Secret Lair Drop Series] SWSH122 You may play lands from

You may play lands from your graveyard

As the House of Novarchon grew in power

and library for a card named The Spear of Leonidas

where X is the number of artifacts you control

−5: Artifacts you control become artifact creatures with base power and toughness 5/5 until end of turn

Tiamat (Showcase) [Secret Lair Drop Series] SWSH122 You may play lands fromSet: Secret Lair Drop Series 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.