Aegis is Sticorey's Ultra Attack. He shields everyone of your team with his shield and make everyone invincible for a while. It takes one Slush Token to unlock and two Ultra bars to activate.
The image for Aegis.
Trivia
- In Slush Tile Rush, his Ultra is now an offensive skill. He will destroy all enemy tiles and turn them into damage, each of which does 5 damage.