Achak, the Thunderous

Achak, Thunderous Beastmaster must attack each turn if able. As long as it's attacking, it has indestructible.
Whenever Achak, Thunderous Beastmaster attacks, create a 3/3 green Beast creature token with trample, a 1/1 white Bird creature token with flying, and a 2/2 red Coyote creature token with first strike that are all tapped and attacking. Exile those tokens at the beginning of the next end step.