Labyrinth's Vault

When Labyrinth's Vault comes into play, exile target creature an opponent controls.
Whenever an opponent casts a spell, put a time counter on Labyrinth's Vault.
{t}: Add {b} or {r} mana to your mana pool.
When Labyrinth's Vault has five time counters, sacrifice it: Return the exiled card to
the battlefield and create a 4/4 red/black Minotaur creature token with trample and haste.