cube of command

you cast forth a 200x200 ft cube of force with copper wireing dancing on its surface in which you can control anything inside of (escape dc 25 Dex saving throw)

inside the cube, all creatures' speed is reduced to 0 and are restrained as copper shackles come from the ground to restrain them and are held aloft as if an invisible force is holding them there unless they succeed a dc20 Str saving throw 

 by speaking the way you wish the creatures or things inside to be affected, you may conjure any of these affects listed or work with your DM to determine new affects:

• Acid: by looking at a creature(s) or object within the cube you may say the command word and they will be submerged in acid until you wish for it to stop or the spell ends; for each turn the creature is submerged in the acid, that creature takes 5d12 acid damage (if a creature is immune to acid damage, they take no damage unless striped of their immunities, as listed later) 
• fire: by pointing at a creature and speaking the command word, it is engulfed in flame for 3 of its turns and due to the pain they are receiving, they cannot take actions, plus they take  5d10 fire damage.
• water: by pointing at a creature or object and speaking the command word, you can submerge a creature or object in water for 1d4 minutes and after 2minutes of that time (if they can't breathe water) they will take 5d5 force damage and will not be able to use fire type spells/attacks and they will be susceptible to lightning and cold damage. 
• remove immunities: by speaking the command word you can strip a creature of its protection against all damage types, oozes turn solid and dragon scales become like the shell of a soft-shelled crab.
• disable: you target a creature and speak the command word, once you do so you can choose to make the following (permanent) dishabituating affects happen (unless they already affect the creature); 1) the targeted creature is deafened, blinded or something of the like. 2) the targeted creature's limb(s) fall off as if it was chopped off and the wound cauterized. 3)the targeted creature goes mad (role on the permanent madness table) 4) the targeted creature becomes braindead but is still alive.
• bury: the creature is buried alive, and its shackles bury them into the earth. As they are dragged down, they take 3d20 bludgeoning damage and are also subjected to the same affects as being submerged in water (take 5d5 force damage for every action they take underground past 2 min) 
• freeze: by speaking the command word and pointing at a creature, the targeted creature will be frozen solid. for each turn that the creature stays frozen, they take 10d5 cold damage.
• poison: by speaking the command word, a targeted creature is surrounded by a poisonous gas and take 6d12 poison damage.
• auto fail: any targeted creature that tries to make an attack role automatically fails it as a reaction