Celeste is a radiant support mage in Deadlock who blends healing with area Spirit damage to sustain allies and threaten enemies. Starfall and Celestial Beam provide both protective utility and offensive pressure in the same rotation. Best builds combine Spirit Power for healing and damage amplification with Vitality to keep her alive in active fight positioning. Celeste excels in extended teamfights where sustained healing and repeated ability cycles outweigh single burst interactions. She can be targeted and eliminated quickly if caught without peel. A strong meta support for players who want an active combative healer rather than a purely passive backline presence.