Glasspool Mimic // Glasspool Shore (Extended Art) [Zendikar Rising] Skeleton but I knew it weren't

but I knew it weren't no ordinary hunk o' rock

Set: Streets of New Capenna Commander Type: Sorcery Rarity: Rare Cost: {3}{B} Each opponent separates the creatures they control into two piles

Set: Aether Revolt Prerelease Promos Type: Legendary Artifact Rarity: Mythic Cost: {6} Whenever Gonti's Aether Heart or another artifact enters the battlefield under your control

At the beginning of the upkeep of enchanted land's controller

Glasspool Mimic // Glasspool Shore (Extended Art) [Zendikar Rising] Skeleton but I knew it weren'tSet: Zendikar Rising Type: Creature Shapeshifter Rogue Rarity: Rare Cost: {2}{U} You may have Glasspool Mimic enter the battlefield as a copy of a creature you control, except it's a Shapeshifter Rogue in addition to its other types. Reverse Type: Land Shapeshifter Rogue Land Glasspool Shore enters the battlefield tapped. {T}: Add {U}.