Large Plant, neutral
Armor Class 15 (natural armor)
Hit Points 142 (15d10+60)
Speed walk +20
Challenge 6
Skills perception +2
Damage Vulnerabilities fire
Damage Resistances lightning, slashing
Damage Immunities cold
Condition Immunities blinded, deafened, frightened
Senses darkvision 60', passive Perception 12
Languages Sylvan
False Appearance. While motionless indistinguishable from ice-covered willow tree.
Ice Melt. If it takes fire damage its icicles partially melt. Until the end of the ice willow's next turn creatures have advantage on saves vs. the willow's Icicle Drop and Icicle Spray.
Multiattack. Two Slam attacks.
Slam. Melee Weapon Attack: +7 to hit, 10 ft., one target, 13 (2d8+4) bludgeoning damage + 7 (2d6) cold.
Icicle Drop (Recharge 4-6). Shakes several spear-like icicles loose. Each creature within 10 ft. of the willow must make a DC 15 Dex save taking 9 (2d8) piercing damage and 7 (2d6) cold on a failed save or half damage if made.
Icicle Spray (Recharge 6). Flings icicles in a 30' cone. All in area make a DC 15 Dex save taking 18 (4d8) piercing damage and 14 (4d6) cold on a failed save or half damage if made.
Melting Icicles. When the ice willow takes fire it can immediately use Icicle Drop if available.
Source: Tome of Beasts 3 · OGL/Open