Bone Saw (Retro Schematic) (Serialized) [The Brothers' War Retro Artifacts] Horse Goldvein Hydra enters the battlefield

Goldvein Hydra enters the battlefield with X +1/+1 counters on it

Set: Outlaws of Thunder Junction Commander Type: Land Rarity: Rare T: Add C

then cast it transformed

Set: March of the Machine Prerelease Promos Type: Legendary Creature — Elder Dinosaur Rarity: Rare Cost: {5}{R}{R} Trample

then return Journey to Eternity to the battlefield transformed under your control

Bone Saw (Retro Schematic) (Serialized) [The Brothers' War Retro Artifacts] Horse Goldvein Hydra enters the battlefieldSet: The Brothers' War Retro Artifacts Type: Artifact Equipment Rarity: Uncommon Cost: {0} Equipped creature gets +1 +0. Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.) "When metal instruments are scarce, a saw constructed from the subject's femur will suffice for a craniectomy." Ashnod, resaerch notes