Empires & Allies – How do I level up Mantis in the game?

When your Mantis engages in a battle, it earns XP based on the damage done and received. It also gains XP for all successful defenses when it is on Defense mode.Mantis can be upgraded up to Level 15. You can level up your Omega unit faster using the 2X XP Boost and the Instant XP Boost available in the Robotics Bay.

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Empires & Allies Game GUIDE