Clocktower of the Catalyst

Mutual (No player controls this artifact. If it would
be destroyed, remove it from the game entirely. All players can activate this card's abilities.)
Clocktower of the Catalyst enters the battlefield with 3 catastrophe counters on it. If there are no catastrophe counters on it, all players lose the game.
Remove a catastrophe counter from Clocktower
of the Catalyst: Take an extra turn after this one.