Radiant Shardling (5e Template)
From D&D Wiki
Because shardlings are very attuned to mental energy, a shift can disturb their personality and psionic abilities. If a shardling stayed around a portal to the Upper Planes or a group of righteous celestials, for example, then it would eventually begin to take on their attributes as it is permanently infused with positive energy. They also change colours, from their natural green to glowing white.
Hit Dice. Increase the radiant shardling's hit dice by 2.
Languages. The radiant shardling learns Celestial and Sylvan.
Damage Immunities. The radiant shardling becomes immune to radiant damage.
Innate Spellcasting (Psionics). The radiant shardling adds the following spells to its Innate Spellcasting.
Magic Resistance. The radiant shardling has advantage on saving throws against spells and other magical effects.
Multiattack. The radiant shardling makes all its normal attacks, followed by a Radiant Beam.
Recalculate the creature's CR with the following considerations:
- Increased hit points (from improved hit dice).
- Immunity to radiant damage.
- Increase effective AC by 2 (from Magic Resistance).
- Increase per-round damage by the amount listed in the trait (from Radiant Beam).