core holder

Connection to mainframe. the core holder has many 3 tubes connecting him to his lair, the rubber tubes have 10 health and 14 ac, they have immunity to lightning and bludgeoning damage and when one is cut, the core holder loses their ability to use one of their lair actions

Fighting for control: The druid who is being controlled in the core is fighting against the control, in the suit the druid must make a dc 23 wisdom saving throw, on a fail the spell is cast to attack the party or aid the core, but if succeeded the spell that is cast is cast to heal or support the party.

Spellcasting. The Core holder is a 10th-level spellcaster. Its spellcasting ability is Wisdom (spell save DC 17, +9 to hit with spell attacks). The  has following druid spells prepared:
Cantrips (at will): Thorn Whip, Thunderclap, frostbite, mending
 1st level (4 slots): faerie fire,healing word, fog cloud                                                          2nd level (3 slots): moonbeam, Healing spirit, Heat metal, flaming sphere                          3rd level  (3 slots): Aura of Vitality, conjure animals, call lightning.                                        4th level (3 slots): Ice Storm, Stoneskin, Fire shield                                                                    5th level (2 slots): maelstrom, contagion

Multiattack. the core holder makes 2 slam attacks, casts one spell 

slam. Melee Weapon Attack: +8 to hit, reach 5 ft., 1 target. Hit:  (1d12 + 4) bludgeoning damage.

fume spray (recharge 5-6): the core holder chooses a gas to spray at the party.                

Poison gas: 30 feet cone, dc 16 dexterity saving throw or take 5d6 poison damage and be poisoned for 1 minute halved on success and no poison.                              

incapacitation gas: 10 foot radius, dc 16 dexterity saving throw or take 5d6 psychic damage and be incapacited for the next 2 turns, halved damage on success and no incapacitated

blinding gas: 30 feet cone dc 17 dexerity saving throw or take 6d6 psychic damage and be blinded for 1 minute, you are also teleported to a random place on the battlefield halved damage on success and no blinded or teleportation

further restrictions. the machine can attempt to make it harder for the druid to fight over control, the machine must succeed on a dc 19 strength check to pull the druid further under control making the dc for the fighting for control harder by how well the machine passed the check, making a 19 makes it +1

Reaction Name. Enter the description for your action.

the machine can take 3 legendary actions per round in between a players turn

slam (Costs 1 Actions). the machine makes a slam attack against a creature it can reach

mend (Costs 1 Actions). the machine mends itself healing itself 2d6 hitpoints

I know you gonzar (Costs 2 Actions). Gonzar feels a very loud ringing coming from his ear, he must make a dc 17 wisdom saving throw or take 6d6 psychic damage and be blinded for a turn

Mythic Action Name. Enter the description for how mythic actions work for your monster here.

Mythic Action Name (Costs # Actions). Enter the description for your mythic action.