MEO_KYUUKETSUKI'S PROFILE

I actually found a MUCH more simple script that works awesome.

I have been using VX Ace for a while now and everything seemed to come easy but I can't figure out how to get a throw potion skill to work. I have tried variables, conditional branches, common events, scripts, including Yanfly's skill cost manager, and I cant figure it out. Could I get some help?

What I need to figure out is how to make a skill that checks for a certain item in the player inventory, if the item is present, it is to be removed, if not the skill will fail. This is for Throw Potions and such.