Winterbole Rimeneedle

The treants of the Winterbole have made pacts with a primordial spirit of the harsh winters known as the Prince of Frost. This granted them great powers, but it convinced the deciduous treants of the Harken Forest took this as more proof of the conifer’s traitorous tendencies. Their later allegiance to the white dragon Bitterstrike is even more damning, and sparked a new set of battles as the Harken treants marched upon the Winterbole in a fury.

Originally from the 4e Monster Vault: Threats to the Nentir Vale. This post came out a week ago on my Patreon. If you want to get access to all my monster conversions early, as well as access to my premade adventures and other material I’m working on, consider backing me there!

5th Edition

Winterbole Rimeneedle
Large plant, usually true neutral
Armor Class 15 (natural armor)
Hit Points 114 (12d10 + 48)
Speed 40 ft.
Str 19 (+4) Dex 12 (+1) Con 18 (+4) Int 13 (+1) Wis 17 (+3) Cha 12 (+1)
Damage Resistances bludgeoning, cold, piercing
Damage Vulnerabilities fire
Senses passive Perception 13
Languages Common, Elvish, Sylvan
Challenge 6 (2300 XP)
Ice And Forest Walk. The treant can move across icy surfaces without needing to make an ability check. Additionally, difficult terrain composed of ice, snow, or natural plants doesn’t cost it extra movement.
Trampling Charge. If the treant moves at least 20 feet straight toward a creature and then hits it with a melee attack on the same turn, the target must succeed on a DC 15 Strength saving throw or be knocked prone. If the target is prone, the treant can make one Stomp attack against it as a bonus action.
Winter’s Step (1/Short Rest). As a bonus action, the treant can magically teleport up to 25 feet to an unoccupied space it can see. Each creature within 10 feet of it after it teleports must make a DC 15 Constitution saving throw, taking 10 (3d6) cold damage on a failed save, or half as much damage on a successful save.
Actions
Multiattack. The treant makes two Slam attacks.
Slam. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 11 (2d6+4) bludgeoning damage.
Stomp. Melee Weapon Attack: +7 to hit, reach 5 ft., one prone creature. Hit: 20 (3d10+4) bludgeoning damage.
Rock. Ranged Weapon Attack: +7 to hit, range 60/180 ft., one target. Hit: 15 (2d10+4) bludgeoning damage.

13th Age

Winterbole Rimeneedle 
6th level troop [plant] 
Initiative: +5
Vulnerability: Fire
Slam +11 vs. AC – 20 damage
Tree Stomp +10 vs. PD – 14 damage
Natural Even Hit or Miss: As a free action, the rimeneedle can move and make another tree stomp attack against a different nearby enemy (provoking opportunity attacks).
C: Winter’s Step +11 vs. PD (1d4 nearby enemies in a group; before dealing damage the rimeneedle teleports to engage one of the targets) – 12 cold damage
Miss: 6 cold damage.
Limited Use: 1/battle.
Cold Resistance 16+.
Hardwood Resistance: The rimeneedle has resist damage 12+ to all damage except fire damage and melee weapon damage.
AC 24 PD 22 MD 16 HP 76