Bowser's Fury

When Bowser's Fury enters the battlefield, create X 5/5 Bowser Spike creature tokens tapped and attacking, where X is the number of creatures you control. Sacrifice them at the beginning of the next player's upkeep.
{t}: Create 10 5/5 Fireball creature tokens tapped and attacking. Sacrifice them at the beginning of the next player's upkeep.