Illuminating Presence. The Solar Sentinel emits bright light in a 60-foot radius and dim light for an additional 60 feet. Creatures that start their turn within 5 feet of the Solar Sentinel while it's emitting bright light take 10 radiant damage.

Radiant Strikes. The Solar Sentinel's melee weapon attacks deal an extra 7 (2d6) radiant damage.

Sunfire Burst (Recharge 5-6). The Solar Sentinel releases a burst of intense sunlight in a 20-foot radius. Each creature in that area must make a DC 16 Constitution saving throw, taking 28 (8d6) radiant damage on a failed save, or half as much on a successful one.

Multiattack. The Solar Sentinel makes two radiant longsword attacks.

Radiant Longsword. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 9 (1d8 + 4) slashing damage plus 7 (2d6) radiant damage.

Blinding Radiance (Recharge 6). The Solar Sentinel targets one creature it can see within 60 feet of it. The target must succeed on a DC 16 Constitution saving throw or be blinded until the end of its next turn.

Healing Light (Recharge 5-6). As a bonus action, the Solar Sentinel can heal itself or one creature it can see within 30 feet of it. The target regains 10 (3d6) hit points.

Luminous Shield. When the Solar Sentinel is hit by an attack, it can use its reaction to impose disadvantage on the attack roll, causing the attacker to reroll.