Recommended Free Units

There are quite a few free units available in game. Some are only temporarily available through events, and some are permanently available. They vary quite a bit in quality and usefulness and there are some that are particularly worth investing time to get. Below is a list of permanently available free units you may want to use. Note that units not included here aren't necessarily useless but they are more situational and not likely to be a top priority, or they may be time limited. For a list of all free units available either from temporary events or permanently in the game, see List of units/Free.