Crystal Clarity. The Guardian is immune to any effect that would take control of its actions or mind, and it cannot be frightened. Sharpness. Any creature that strikes the Guardian in melee combat suffers half of the damage they deal, rounded down. Shielded by Stone. The Guardian does not suffer extra damage from critical hits.
Multiattack. The Guardian makes two attacks using its morningstar or one attack with its morningstar and one with shield bash or spends its turn using radiance. Morningstar. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 1d8+3 piercing damage. Shield Bash. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit:1d4+3 bludgeoning damage and the target must succeed on a DC 13 Strength saving throw or be knocked prone. Radiance. The Guardian blasts a target with healing radiance, healing them for 1d4+3 hit points. This healing die, and its bonus are increased by 1d4+3 each time radiance is used, up to a cap of 5d4+15 healing.