Choke
Melee During a melee attack, when the defending army rolls for saves, target up to X health-worth of units in the that army that rolled an ID result. The target units are killed. Their ID results are not counted towards the army's save results.

Note: Choke works outside of the normal sequence of die roll resolution, applying its effect immediately after the defending army makes its save roll but before they resolve any re-roll effects or SAIs.