If I hit you with Ray of Frost, and my friend hits you with Ray of Frost immediately after, do you have your speed reduced by (10×2=)20 until the start of my next turn?
Or do you only lose 10 speed since the effect does not stack?
(Note: this is also applicable with the Warlock invocation Lance of Lethargy)
Best Answer
They would not stack
From the SRD:
Although Ray of Frost's damage would apply with each hit, the speed reduction is an effect that the above rule would prevent from stacking with itself. However, it would still stack with other speed reducers like Lance of Lethargy or Frost Lance.