Biollante

Gargantuan Monstrosity, CN
AC: 19, HP: 838
Speed: 120', Burrow: 60', Swim: 60'

Str: 30 (+10), Dex: 24 (+7), Con: 28 (+9), Int: 26 (+8), Wis: 30 (+10), Char: 26 (+8)
ST: Str: +19, Con: +18, Wis: +19
Skills: Arcana: +17, Perception: +19, History: +17, Insight: +19, Investigation: +17, Nature: +17
Dmg Resistance: Melee attack spells
Dmg Immune: Force, Non-magical slashing, piercing and bludgeoning, Poison, Cold, Acid, Fire, Lightning
Conditions Immunities: Charmed, Frightened, Defeaned, Diseased, Exhaustion, Grappled, Incapacitated, Paralyzed, Petrified, Poisoned, Prone, Restrained, Sleep
Senses: Truesight: 60', Blindsight: 60, Tremorsense: 120', PP: 29
Languages: All
Challenge: 30 (155,000 XP)
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Law of Nature (4/Long Rest): All creatures with more than the "Humanoid" creature type, except Biollante, within 300' of her must make a DC 27 Con Save. Upon failer the creature/target suffers 20d4+19 magical bludgeoning and piercing dmg. Also the target suffers 1d8+3 Con dmg. Upon save, the target takes no Con dmg and suffers hald dmg. Should the creature's health or Con drop to 0 they sprout vines and roots, becoming an extension of Biollante. Lasts 1d8+4 hrs.

Innate Spellcasting: The Biollante's innate spellcasting ability is Wis: SDC=27, +19 to hit. It can cast the following spells, requiring no material components:
10/day each: Awaken, Call Lightning, Charm Person, Conjure Fey, Contagion, Counterspell, Cure Wounds, Detect Magic, Detect Thoughts
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ACTIONS

Multiattack: The Billonate makes one spear vine attack and one maw vine attack
Spear Vine: Melee Weapon Attack; reach 60' eight targets, +19 to hit. On a hit target takes 12d10+19 piercing dmg plus 6d6 acid dmg.
Maw Vine: Melee Weapon Attack; reach 60' five targets, +19 to hit. On a hit target takes 10d12+19 piercing dmg plus 5d6 necrotic dmg. This dmg bypasses resistances and immunities as it is not the dark powers
Bite: Melee Weapon Attack; reach 10' three targets, +19 to hit. On a hit target takes 20d12+19 piercing dmg plus 10d12 acid dmg.
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Legendary Actions

The Biollante can take three lengendary actions, choosing from the options below. Only on legendary action option can be used at a time and only at the end of another creature's turn. The Biollante regains spent legendary actions at the start of it's turn.

Spear Vine (Costs 3 Actions): The Biollante makes a spear vine attack
Maw Vine: The Biollante makes a maw vine attack.