deterence field v2

This spell creates a 5ft by 5 ft wall of near-invisible force which grants a +1 to AC and dexterity saving throws when you or an ally uses it as cover, though hostile creatures may not use the barrier as cover. It is hard enough that if one gently interacts with it, it is can be used as a flat plane. For example: if you were to walk on it, it can be used as a floor. If you were to fall prone on it, use it to break your fall, run through it, or a hostile creature were to make a melee attack against a target protected by this barrier you would encounter resistance detailed as follows.

Whenever any creature attempt to challenge the barrier, they must take a strength saving throw versus your spell save DC or suffer one of the following penalties:

1. Take 1d4 force damage

2. Remove 10ft from the target's speed until the end of the caster's next turn

The negative affects are applied once a creature triggers the spell, but only occurs once on a creatures turn even if they trigger it more than once. I.e, if 10 creatures go through the barrier, then back through it again, all will take the save only once per turn.

Upon reaching 5th level, you can create 2 of these barriers within range instead of one, any amount of barriers created by your casting of this spell can be condensed into one 5x5 barrier to stack the effects and create an improved barrier with all the potency of however many barriers were used to make it. (For example, one 5x5 barrier that grants +2 ac, and 2d4 damage, e.t.c.) At 11th level, you get 3 barriers, and at 17th, you get 4 barriers