New dark spell chief! Time Rift

Alright so what this would do is slow down the attack rate of defensive towers, heroes, and/or clan castle troops. This effect would last for several seconds right? Not much, about 5 seconds at level 1, 10 at level 2, 15 at level 3, and stop at level 3. The radius of the effect would be the same as the poison spell, and I assume all spell radii are the same.
If that is the case, then yeah the defenses within that radius. As for the color of the liquid in the vile? Pearl white. Refuting this idea and or building on this idea in the comments below plz! ↓↓↓

Oh never mind. How do I delete a thread? Didn't see this idea was on the same page