Crystal Hide- Whenever the Young Crystal Styracosaurus is hit with an elemental attack it can use its reaction to change its elemental resistance and the damage type of its beam attack to the triggering damage type

Multiattack. The Styracosaurus makes two attacks: one with its bite or laser and one with its tail.

Bite. Melee Weapon Attack: +6 to hit, 5 ft., one target. Hit: 10 (1d12 + 4) piercing damage.

Tail. Melee Weapon Attack: +6 to hit, reach 10 ft., one target. Hit: 8 (1d8 + 4) bludgeoning damage.

Elemental Crystal Beam. Ranged Weapon Attack: +5 to hit, range 120 ft., one target. Hit: 8 (1d10 + 3) cold damage.