Repurposing Bay
Artifact
, 
, Sacrifice another artifact: Search your library for an artifact card with mana value equal to 1 plus the sacrificed artifact's mana value, put that card onto the battlefield, then shuffle. Activate only as a sorcery.
William Tempest
Aetherdrift (DFT)
• #380Rulings
If there’s an {X} in the sacrificed artifact’s mana cost, X is 0 when determining its mana value.
(wotc • 2025-02-07)
Rulings
If there’s an {X} in the sacrificed artifact’s mana cost, X is 0 when determining its mana value.
(wotc • 2025-02-07)