Destroy enemy turrets by deploying your units on the battlefield. Card deployment requires energon, the meter at the bottom of your screen shows your available energon. Unlock crates by winning matches and participating in events, these will allow you to gain new units and level up your existing ones.
Upgrade and change your deck to try out different strategies as you play against new opponents. Level up your Turret by upgrading your cards and earning XP.
There are ways to level up your squad without playing against opponents by participating in the Daily Rewards, Missions and Events by earning more Ore-13 and cards.
Check the Supply Shop for more opportunities to unlock cards or using Shanix.