Dark Form. The Crystal Shade can transform into a shapeless shadow that is immune to all damage except radiant, and it's able to move through surfaces. It can take this form as long as it is not in sunlight.   Magic Devourer. Whenever the Crystal Shade kills a caster, its current and hitpoint maximum is rised by one hit die for the next 24 hours as it absorbs the magic, making itself stronger. This effect can stack.   Shield of Darkness. While not in sunlight, the Crystal Shade is immune to fire damage, and it gets a +2 bonus to its AC.   Spell-Eater. Crystal Shade has an advantage on saving throws against magical effects. When hit by a spell that it saves against and thus does no damage to it, that misses it, or whose type it is immune to, it absorbs the spell. Roll 1d8 to see what happens when the spell is absorbed.   1-2. The spell is spit back at the caster. If it requires a saving throw, it's that of the original caster.   3-4. The Crystal Shade recieves HP equal to the amount of damage the spell would have dealt. If the spell is not damaging, nothing happens.   5-6. The Crystal Shade spits the spell at a random target. If the spell requires a saving throw, it is that of the original caster.   7-8. The Crystal Shade becomes enthralled by the taste of magic, gaining an advantage on its next melee attack roll.   Sprouting Darkness. Every 40 hit points the creature loses, there is a 50% chance a Shade Sprout emerges from the seperated darkness.