Chromatic Guardian (Green)

Multiattack. The Guardian makes two Chromatic Burst attacks.

Chromatic Burst. Melee or Ranged Spell Attack: +8 to hit, reach 5 ft. or range 60 ft., one target. Hit: 11 (2d10) poison damage or damage of a random type determined by rolling a d4: 1, acid; 2, lightning; 3, fire; 4, cold.

Spellcasting. The Guardian casts one of the following spells, requiring no material components and using Charisma as the spellcasting ability (spell save DC 16):

At will: guidance, minor illusion, prestidigitation

2/day each: phantasmal force, shield of faith, mirror image

1/day each: dispel magic, counterspell, enemies abound

Chromatic Transfusion (2/Day). The Guardian can sacrifice its own lifeforce to heal another creature. It takes (4d10) necrotic damage, which can't be reduced in any way, and one creature of its choice that it can see within 60 feet regains a number of hit points equal to the necrotic damage the Guardian has taken. If the target creature is a Dragon, it gains an additional (2d10) hit points.

Chromatic Shield (2/Day). When the Guardian or another creature it can see within 60 feet would take damage, the Guardian can conjure a Chromatic Shield around the damaged creature. The creature gains resistance to the damage type that triggered this reaction until the end of its next turn.