Rare item check trigger

hi people do u know how to do a rare item check trigger? because for my map i will be adding rare item and i don't want any hero to carry more than 1 of the rare item. hence if he carry more than 1 rare item the momment he carried the second rare item it will be drop.

Variables:

NrOfItems : Integer

Events:
A hero picks up (or whatever) an item
conditions:
item being manipulated equal to (rare item)
Actions

for each integer A from 1 to 6
if item type of (item in slot (integer A) equal to (rare item)) then
nrOfItems = NrOfItems + 1
end if
end loop

if NrOfItems > 1 then
drop (item being manipulated) from (hero manipulating item)
end if

That should work.

there are a few ways I beleive.. you can use item groups or not.. unit aquires item.. if item is in itemgroup then do: count items held by unit in itemgroup and do if number is greater than 1 remove item being manipulated from unit.. something of that sort.. I don't know about exact events conditions and actions but they shouldn't be hard to figure out.. and sorry if my typing is messed or if I am wrong.. kinda tired atm.. but I tried ehh.. I'm slow to do things.. posted slow.. but he did a better job anyways with the whole layout and things >.<