Ancient Lunar Dragon

Spelljammer: Adventures in Space

Traits

Legendary Resistance (3/Day). If the dragon fails a saving throw, it can choose to succeed instead.   Tunneler. The dragon can burrow through solid rock at half its burrowing speed and leaves a 20-foot-diameter tunnel in its wake.   Unusual Nature. The dragon doesn’t require air.

Actions

Multiattack. The dragon makes one Bite attack and one Tail attack.   Bite. Melee Weapon Attack: 1d20+16 to hit, reach 20 ft., one target. Hit: 19 3d6+9 piercing damage plus 10 3d6 cold damage.   Tail. Melee Weapon Attack: 1d20+16 to hit, reach 20 ft., one target. Hit: 13 1d8+9 bludgeoning damage.   Cold Breath (Recharge 5–6). The dragon exhales a blast of frost in a 90-foot cone. Each creature in the cone must make a DC 23 Constitution saving throw. On a failed save, the creature takes 54 12d8 cold damage, and its speed is reduced to 0 until the end of its next turn. On a successful save, the creature takes half as much damage, and its speed isn’t reduced.

Bonus Actions

Phase (3/Day). The dragon becomes partially incorporeal for as long as it maintains concentration on the effect (as if concentrating on a spell). While partially incorporeal, the dragon is Immune to bludgeoning, piercing, and slashing damage.

Legendary Actions

The dragon can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature’s turn. The dragon regains spent legendary actions at the start of its turn.   Tail Attack. The dragon makes one Tail attack.   Treacherous Ice. Magical ice covers the ground in a 20-foot radius centered on a point the dragon can see within 120 feet of itself. The ice, which is difficult terrain for all creatures except lunar dragons, lasts for 10 minutes or until the dragon uses this legendary action again.   Wing Attack (Costs 2 Actions). The dragon beats its wings. Each creature within 20 feet of the dragon must succeed on a DC 23 Dexterity saving throw or take 12 1d8+8 bludgeoning damage and be knocked prone. The dragon can then fly up to half its speed without provoking opportunity attacks.