Tempra, heart of time

{4}, {t}: End the turn. Put a day counter on Tempra, heart of time. This ability can only be activated on your turn.
{t}, remove X day counters from Tempra, heart of time: Take X extra turns after this one, where X is the number of day counters removed from Tempra, heart of time minus three.
Without it, time travel would cease to exist in tempra.