Halve all damage (rounded up) that would be done by units in the Ground arena (before damage prevention).
Each of your units gets "Foresight: Remove 1 damage counter from this unit."
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.