Eon Vault

Eon Vault comes into play tapped, with X Time
counters on it. Eon Vault is Indestructible.
{t}: Remove three time counters from Eon Vault:
Take an extra turn after your next normal turn.
{1}: Untap Eon Vault
{2}{t}: Remove X time counters from Eon Vault:
Create X times four 1/1 artifact Servo Tokens.
{3} Untap target artifact.
{4}{t}: Put a Time counter on Eon Vault.
Centerterrans preserved things by stopping time itself.