The Immortal Sun [Commander Masters] Phyrexian Dragon Skeleton −7: Exile the top seven

−7: Exile the top seven cards of your library

Tawnos refined the rare metals in the earth into self-assembling strands

or spell you controlled dealt damage to it this turn

Set: The Brothers' War Retro Artifacts Type: Legendary Artifact — Equipment Rarity: Mythic Cost: {4} At the beginning of combat on your turn

but how do we get down

The Immortal Sun [Commander Masters] Phyrexian Dragon Skeleton −7: Exile the top sevenSet: Commander Masters Type: Legendary Artifact Rarity: Mythic Cost: {6} Players can't activate planeswalkers' loyalty abilities. At the beginning of your draw step, draw an additional card. Spells you cast cost 1 less to cast. Creatures you control get +1 +1