Shot down an air unit with a TNT

Killed a tower with a full power trebuchet shot

Caught a cow with a dragon

Destroyed 10 units with a single TNT

Destroyed a tower with a building projectile

As a tower is being destroyed, fire a projectile and destroy an enemy tower

Get 5 tower kills by destroying the tower it is linked to

Changed a cow into a mad cow

Chained 4 towers with a single Hex Curse

Hit 8 friendly units with the Haste spell

Hit 10 enemy units with the Freeze spell