Locked Vault

When Locked Vault enters the battlefield, put a 0/1 Clue artifact creature onto the battlefield with defender and "{t}: Put a secrets counter on Locked Vault. It loses indestructible until end of turn."
Indestructible
{5}, {t}, Remove five secrets counters from Locked Vault: Put a 0/1 Clue artifact creature onto the battlefield with defender and "{t}: You win the game."