Baylan Skoll - Power Beyond Dream (Hyperspace) - Ashes of the Empire (ASH)

Action [1, Exhaust]: Give a friendly unit +2/+2 for this phase if it's the only unit in its arena.

Deployed Leader Unit:
On Attack: You may give a friendly unit +2/+2 and Sentinel for this phase if it's the only non-leader unit you control in its arena. (Enemy units in its arena must attack a Sentinel when they attack you.)