Each of your units in the Ground arena gets "Foresight: Gain 1 Force"
Keywords
Foresight
Foresight: [Effect]: A static, layered effect that means, "Whenever this unit attacks, you may predict the number of hits that will be rolled for that attack. If you're correct, gain the [effect]." For example, a unit with "Foresight: Gain 2 Force" will give you 2 force if you guess the number of hits rolled correctly.