yeah, best example "i think" black king bar
// Don't read if you dont wanna know about dota mechanics
Black king bar is an item switched on the first use. This is one of the reasons why the item is undroppable, the other reason is that "MAYBE" it is an avatar without buff of timer, if naix "avatar" and the item were used at the same time, it will cause the game to crush. (2 avatar won't stack) however, I belive naix avatar is made of metamorfesis into hero that has spell defense inside an hidden spellbook. another thing is that dropping avatar might cause game crush ( I didnt check it but I belive it cause instant game crush when the item is dropped ). So the item is a special case. Wand is an item who has dummy ability that gives 25 heal x number of item charges (having 2 wands will cause only the one who is in the first slot to active, the others ignored [this is because the spell do "if the hero has item of type" and not "for each integer for 1-6 is item hero in slot A is a wand?] ).
// Don't read if you dont wanna know about dota mechanics
The idea
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Disable Books
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Events
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Time - Elapsed game time is 1.10 seconds
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Conditions
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Actions
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For each (Integer A) from 1 to 12, do (Actions)
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Loop - Actions
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Player - Disable Book: Dispelling Rage 1 for (Player((Integer A)))
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Player - Disable Book: Dispelling Rage 2 for (Player((Integer A)))
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Player - Disable Book: Dispelling Rage 3 for (Player((Integer A)))
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Player - Disable Book: Dispelling Rage 4 for (Player((Integer A)))
Dispelling rage 1 contains an aura effects only self = the fake "buff", attack speed increaser and spell immunity.
Dispelling rage 2 contains an aura effects only self = the fake "buff", attack speed increaser of a greater level and spell immunity.
ETC.
^ upon activation it will not show the spellbook, the unit will be unable to be casted spell upon nor targeted by abilities and the player will see the buff "Dispelling Rage" as if it was some sort of roar, but the buff won't go on off on off on off before it disapear, its just an aura which is removed 2 seconds after I remove the spell book, then I use "Action: remove specific buff" and remove the aura buff to make it instantly removed, it wont go on off on off like its shows on windwalk that is about to end its duration<- this is not fixable.
Using that, you can do the same with items, just try and post the triggers, and I will try further to explain till you done it right.
" Doing something for somone else is helping him once, teaching someone is helping million times "