[ASK] Upgrade normal hero to anothers stronger hero using item ?

[omniversal]

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The test trigger shows what you must do when you revive a unit. Set the revived unit to Unit variable and run the transformation trigger.

hmm.. can i make that the hero only be able to be revived if he buy ankh of reincarnation ?? so no need to using trigger to revive the dying unit ? like x hero the hero can be revived again if he had ankh of reincarnation in hero inventory.
so.. if i dont use a trigger to revive that hero , what must i change from the trigger to maintain the form of my hero that already transform everytimes the hero died and revived again ???



And the trigger may return the money i spent to if i want to buy the "Scroll of GOd" in the max form and disable me to bought the scroll of god again, but the item "Scroll of God" when i bought it in the max form is not being removed and only drop on the ground , maybe something wrong ???!!!