Brawler unit. Sets the enemy on fire.
Tank unit. Attacks seem to go right through it.
Ranged unit. Upgraded attacks shoot farther.
Support unit. Grants smolder to allies. Smolder lets allies live a little longer after they are defeated.
Spellcaster unit. Stuns enemies.
Assassin unit. Initial impact deals bonus damage.
Massive unit. Grows stronger with nearby allies.