(Does that mean Grenk is behind full cover and safe from Fireball? Presumably so if he can't breathe...)

No opportunity to attack with disadvantage from Grenk?  Additionally, if the fireball would blast through and potentially affect Grenk would his shield master feat come into play where he could potentially save for no damage?

(On your turn grenk you can attempt to escape with a grapple check. But if it hits with both attakcs the engulf power is automatic.  And since it includes restrained I don’t think you can attack. And Yes. Grenk has full cover from fireball. Lol.)

Silas will mutters some actual cruses under his breath before summons a Spiritual Weapon onto the one he has struck with his bolts and flame before he throws more scared flame at it.

Spiritual Weapon Attack: 9 Damage: 7 Force Damage

Scared Flame Dex Save: 15 Damage: 11

(Safe to say this is not a cantrip only battle)

Quote from Shodai_Kishi >>

 

(Safe to say this is not a cantrip only battle)

 (Agreed. I'm burning all my spell slots here)

Sighing as Mal witnesses Grenk be engulfed by the creature she knows what she has to do. She thinks first about just striking the vegetation but she is not certain if her strikes will hit Grenk or not, so she does the next best thing. She will run up to the creature sheathing her blades and then reach into it and hopefully be able to rip Grenk from its grasp.

Athletics: 23

Sickle is concerned now.  These are much hardier than he had expected.  Must be maple. Stupid maple.

Lightning streaks from his staff toward the other shrubbery.

(DEX save, DC15, or 32 Lightning damage, half on success)

Grenk was surprised when the creature suddenly struck out and swallowed him whole.  He haf lulled into a false sense of security.  Compressed in darkness and slowly being constricted, he did what he could to try and raise his sword up and cut from the inside.

Attack: 15 Damage: 4 + 10 fire damage

Attack: 8 Damage: 7 + 7 fire damage

If needed dex save with disadvantage 21

Flame Dex save : 0

Mal Grapple : 24

Silas' flame strikes the creature, sending a searing smoking pile falling off. Mal rushes up to the mostly uninjured one that has Grenk and pulls at the weeds and vines trying to free him, but they fight back, pushing and lashing at her, fighting her away. 

Sickle turns to the almost dead plant and points his staff.  The blast of electricity strikes the creature, but instead of hurting it, the lightning dances through the leaves and vines and they seem to grow, puffing out with vibrant green, turning the energy into vitality.  

From inside the thing, Grenk's flaming sword occasionally stabs out through the greenery, smoking vegetation being splayed off. 

(I need CON saves at the start of the mounds turn or you take damage.  I'll take that DEX save as the CON save though, so though you feel the thing constricting all around you, your muscled body resists the pressure.) 

The other mound moves to strike Mal who has come back into melee combat. 

Attack: 11 Damage: 8

Attack: 22 Damage: 13

Badger, your turn. 

Grenk continues to stab out out while the creature constructs.  As the pressure increases he tries to remain firm to keep his breath.

Attack: 11 Damage: 6 + 6 fire damage

Attack: 11 Damage: 10 + 4 fire damage

Con save 16

(Oops, Grenk, you've already taken your turn.  You have to wait for next round.)

Badger will attempt the orb of acid one more time, aiming for the creature that just got rejuvenated by the lightning...

Chromatic Orb at 2nd level. Attack: 10 Damage: 21 acid

(I quit)

Badger releases an acid ball that flies past the huge thing and smashes against the wall, metal hissing and popping. 

The creature with Grenk inside swings both of it's appendages at it's nearest target, Mal. 

Attack: 19 Damage: 15

Attack: 9 Damage: 13

Inside it, Grenk continues to fight, his flaming blade occasionally emerging with smoke and light. 

Sickle, Mal, Silas, your turns. 

Swearing Mal will once again reach inside the creature to drag Grenk out.

Athletics: 9

(Screw up and initial roll 2d4 instead of 1d4 for bless hence the manipulation)

Silas casts Bless at 2nd level, targeting everyone expect Grenk (dont think he's a valid target in this situation) before sending his spiritual weapon to strike the same mound he has been striking.

Spiritual Weapon Attack: 14 Damage: 9 force Bless:2 (17 to hit)

Athletics : 13

Mal continues to try and struggle, but as she grasps at vines and branches the thing continues to fight her off. 

Silas casts a spell and everyone feels holy power filling their bodies. His magical floating weapon thwacks one of the creatures on its head.

Sickle? 

Sickle scowls at the rejuvenated plant creature. “That’s not playing fair.”   He waves his staff again and a shard of ice flies out at one of the creatures (preferably one not next to Mal).

Cast Ice Knife

Attack: 10 Damage: 2 piercing

Additional Damage (within 5ft): DEX Save DC15 or 6 cold damage

(+1d4 for attack roll from Bless)

19 7

The ice knife misses and the shards have minor effects only on the big creatures.  Sickle hears the ring in his mind, "Ice...MORE ice....MORE ICE!"  It seems to be encouraging you to cast an ice storm on them.

Mal, the badly injured creature takes some swings at you : 

Attack: 9 Damage: 10

Attack: 21 Damage: 12

Mal is suddenly enveloped  by the other creature.  (Restrained, grappled, can't breath).

Grenk, Badger, your turns.

Grenk continues his struggle.

Attack: 17 Damage: 7 + 5 fire damage

Attack: 13 Damage: 9 + 7 fire damage

Con save 19