AOE Clouds not having any effects. | skUnity | Page 1

i'm new to skript, and im gonna start by saying that im not trying to get into it either, i just wanna make cool stuff for a server im working on. so basically im not looking for a tutorial, im just looking for an answer.

i'm trying to make a weapon that creates a cloud of wither effect when you right click, im currently using this code to do it but it isnt working:

 if colored name of player's tool is "&dSacred Spear":
  spawn 1 area effect cloud at location of player
  add wither to potion effects of last spawned area effect cloud```

i cant find the answer anywhere else, so i figured id ask here. If anyone knows how to do this that would be greatly appreciated. :)

for more information, it is spawning the effect cloud fine, it just doesnt have any effects no matter what i replace the wither effect with

#AOE Clouds not having any effects.