on right click:
if player is holding a nether star named "&5Potion Menu" with lore "&5Get your potions":
player is in world "ul_KitPVP":
open virtual chest inventory with size 1 named "&5Potions" to player
format gui slot 1 of player with splash potion of harming named "Splash Potion Of Harming" with lore "&5You have: %{%player's uuid%.splashpotionofharming}% Splash Potions Of Harming" to run :
if {%player's uuid%.splashpotionofharming} is less than 1:
message "&4You don't have any Splash Potions Of Harming"
else:
give a splash potion of harming to the player
subtract 1 from {%player's uuid%.splashpotionofharming}
close player's inventory