"Army slots" are the bottom 3 slots in each build. They are awarded from successful dungeon completions and every leader has a distinct pool of options. Each slot can be changed after unlocking by spending Arclight Energy.
Wield the shadows and strike like the wind.
Maiev's cost is reduced by 1 foreach troop you play.
Cast Smoke Bomb on deploy, Stealthing nearby allies.
Periodically teleport to a Ranged attacker when hit.
Deal double damage for 2 seconds after killing an enemy.