Aino and her Bigby's Hand move forward to engage the demon wall as Thumbtack flies by to help before flying back out of harm's way.  She is still on her Broom of Flying with 50' fly speed, and Thumbtack and the Bigby's Hand both have 60' fly speed.

Attack 1:  with Booming Blade and Rapier, +2 on the demon wall with advantage due to help, best of 3d20s due to Elven Accuracy.
To hit:  25 (whew, avoided the nat. 1 on the 3rd die).
Rapier, +2 damage:  9 magical piercing.
Booming Blade immediate damage:  7 thunder.
Booming Blade secondary damage if the demon wall moves on its own (which I think it will!):  7 more thunder.

Attack 2:  with Rapier, +2 on the demon wall, straight roll.
To hit:  30
Rapier, +2 damage: 10 magical piercing.

Total if all damage applies:  9 + 7 + 7 + 10 = 33 (19 magical piercing and 14 thunder).

Bonus Action:  TBD - Aino commands her Bigby's Hand but exactly how depends on the answer to her follow-up question in post 1243 above.

Quote from Tybard >>

Quote from Bushawk >>

The demon is the wall so 30x30 which is huge I believe. If you use this spell you won't be able to stop the wall from moving forward but I'll allow all other effects grapple provides.

What about dragging the demon/wall off the path laterally and dropping it into the void as you could normally do with a flying grappler (Bigby's Hand) that can move 60' on a turn?  That was my main idea, though the Grasping Hand can also deal some automatic damage once it grapples.

Basically - this affects my choice on whether to use Bigby's Hand for Grasping Hand or Clenched Fist as a bonus action.  I'll post the rest of Aino's turn now and wait on your answer to decide her bonus action.

 I'll let you try once and you will need a crit. 

Thanks for the ruling - gotcha.  Aino sees that it would be almost impossible to accomplish and decides to just go the more straightforward route.

Bonus Action:  Aino commands her Bigby's Hand to smack the demon wall (Clenched Fist).
To hit:  (melee spell Attack Roll of +11 is same as her Rapier, +2 so used that to roll)  30
Damage:  (4d8) 20 force damage on top of what she already did.  So 53 total if it all takes effect.

If the wall is right in front of us, are we still within 10' of Storm's aura?

(If so, end of turn).

All hit for the damage. Kileprat is up

Order: Aino, Kileprat, Casey, Storm, Wall

Kileprat will hold her turn for now. Casey is up

By the way, I forgot to add Storm's Bless on Aino's attacks.  Didn't need it this time but just wanted to remind folks.

Casey looks at the wall, and attempts to use telekinesis to move the demon off to the side and into the chasm (demon needs to beat a str check of 21.   (Bard gets to add +2 to ability checks) 

If that doesn’t work, she will reaction cast silvery barbs on the wall, forcing it to reroll the STR check, and giving herself advantage on her next attack:

as a

bonus action, she casts spiritual weapon at 4th level- and a flying, glowing rapier attacks the wall:  22 to hit, 15 HP force damage.  (Plus bless- forgot- add to that 22 :   4 
Finally,  she flies up in the air above the group, but still inside Storm’s protection radius, and whoops for the crowd.

So a 25 to hit for 15 force damage, and the wall needs to make a DC 13 STR check with disadvantage,   She can move up to size huge.

(Note- She didn’t cast Telekinesis this round, it was cast before combat, as posted up above somewhere). 

OOC: I will wait to take Storm's turn until after I see the results of Casey's turn.

The wall rolled passed the check both times, 31 and 25. You get the sense that the walls massive weight makes it nearly impossible to just push off the side 

As you fly up at 30 feet you hit a barrier stopping any further flight up.

With a 25 you hit.

Storm is up

Storm will move forward and point his new blade at a section of the wall so as not to hit any of his allies in the blast. "Dodge this!

Move action: Up to 30 feet closer

Action: Cone of Radiant energy for 35 damage (super bad roll) DC 18 Dex save for half

You might not know this but a Hugh wall is not very good at dex.

Dex save. 10 fail.

Will give Kileprat till tomorrow to post till she is puppeted.

Kileprat will attack the wall. Both hit for 35 damage.

The wall is looking kinda damaged 

It will move forward 20. Forcing everyone to retreat. If you did not have enough movement make a DC 20 Consave or be knocked prone/off the Broom if flying *a magical barrier will prevent you from flying around or above the wall.

The wall will target storm for two claw attacks and a bite.

33, 28, and 35 to hit. For 13, 9, 10 damage. 32 damage total.

Storm, as you are hit you can see your blood being absorbed by the wall repairing it.

Aino is up

As far as movement goes, Aino and Casey have 50' fly speed, each with their Broom of Flying, and Thumbtack and Bigby's Hand 60', so I think they all should have the extra 20'+ movement left over.  Storm is on the Phantom Steed which has 100' walk speed, so he should be fine.

Just not sure about Kileprat.  She has 40' total move speed.

I think Storm needs to make 3 separate DC10 CON Saves to maintain concentration on Bless.  Of course, Bless helps with the save!

I'll post Aino's turn with the addition of Bless separately on the to hit rolls in case they need to be removed.

Aino and her Bigby's Hand engage the demon wall as Thumbtack flies by to help before flying back out of harm's way.  She is still on her Broom of Flying with 50' fly speed, and Thumbtack and the Bigby's Hand both have 60' fly speed.

Attack 1:  with Booming Blade and Rapier, +2 on the demon wall with advantage due to help, best of 3d20s due to Elven Accuracy.
To hit:  26 + 1 =  27 (whew, avoided the nat. 1 again on the 3rd die).
Rapier, +2 damage:  11 magical piercing.
Booming Blade immediate damage:  7 thunder.
Booming Blade secondary damage if the demon wall moves on its own (which I think it will!):  11 more thunder.

Attack 2:  with Rapier, +2 on the demon wall, straight roll.
To hit:  23 + 3 = 26
Rapier, +2 damage: 15 magical piercing (max).

Total from both attacks if all damage applies:  11 + 7 + 11 + 15 = 44 (26 magical piercing and 18 thunder).

Bonus Action:  TBD - Aino commands her Bigby's Hand but exactly how again depends on my follow-up question below.

Movement - on her Broom of Flying, Aino continues backing up only as much as needed based on the demon wall's movement.

Question about the Interposing Hand option for Aino's Bigby's Hand before I post Aino's bonus action  I definitely get that the wall has special rules, so I just want to lay it out and see what you think, @DM.

So the description text for Bigby's Hand for the Interposing Hand option reads:  The hand interposes itself between you and a creature you choose until you give the hand a different command. The hand moves to stay between you and the target, providing you with half cover against the target. The target can't move through the hand's space if its Strength score is less than or equal to the hand's Strength score (26). If its Strength score is higher than the hand's Strength score, the target can move toward you through the hand's space, but that space is difficult terrain for the target.

So I fully get that the demon wall's Strength is likely greater than 26.  But even so, per the description above, the hand (large size) should turn it into difficult terrain, slowing it down.  Notice that there is no saving throw or check, even if the opponent has greater strength.  Aino could use this even to slow down a god.  Of course a god would just teleport or something, but you get the idea.  Trying to reduce the demon wall's move speed of 20'.

And if the Interposing Hand moves to stay between the party and the wall (note - it does not occupy its space), it also provides half cover (+2 AC).

What do you think, @DM?

OOC: Forgot I had the Phantom Steed lol, so yes I have a lot of movement leftover.

Concentration Rolls: 16, 23, 21 all without Bless added they still pass

Quote from Tybard >>

Question about the Interposing Hand option for Aino's Bigby's Hand before I post Aino's bonus action  I definitely get that the wall has special rules, so I just want to lay it out and see what you think, @DM.

So the description text for Bigby's Hand for the Interposing Hand option reads:  The hand interposes itself between you and a creature you choose until you give the hand a different command. The hand moves to stay between you and the target, providing you with half cover against the target. The target can't move through the hand's space if its Strength score is less than or equal to the hand's Strength score (26). If its Strength score is higher than the hand's Strength score, the target can move toward you through the hand's space, but that space is difficult terrain for the target.

So I fully get that the demon wall's Strength is likely greater than 26.  But even so, per the description above, the hand (large size) should turn it into difficult terrain, slowing it down.  Notice that there is no saving throw or check, even if the opponent has greater strength.  Aino could use this even to slow down a god.  Of course a god would just teleport or something, but you get the idea.  Trying to reduce the demon wall's move speed of 20'.

And if the Interposing Hand moves to stay between the party and the wall (note - it does not occupy its space), it also provides half cover (+2 AC).

What do you think, @DM?

 Good move. Mmmm I'll allow it, demon was always moves forward and cannot be stopped. Does not address being slowed.