Combat Chemistry

Can only be used once per encounter. 

Using your knowledge of alchemy, you jury-rig a special item that has the effect of an an elixir, poison, flask or potion with a cost of 300c or lower. 

You can only make the base version of the item with no mods. The item doesn't take up burden, but must be used before the start of your next turn or it is lost. This item can only be used by you.