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: Add 
to your mana pool.
to your mana pool.
| Oracle text |
| Ghost Vault {} |Land| Tap: Add U to your mana pool. / Put Ghost Vault on top of your library: Add 1 to your mana pool. / U, Tap an untapped Zombie you control: Zombies you control have Islandwalk until end of turn. Any player may activate this ability. |