a.  Deploy 3 units of the same element at the same time, and your entire troop will receive buffs: Immortal Physical Defense +20%  Immortal Magical Defense +20%

b.  Deploy 4 units of the same element at the same time, and your entire troop will receive buffs: Immortal Physical Attack +20%  Immortal Magical Attack +20%

c.  Deploy 5 units of the same element at the same time, and your entire troop will receive buffs: Troop HP +10%