Can I detect a buff on a dead hero?

[stan0033]

A hero dies and if it has a buff to resurrect him?

 

[Meticulous]

Units lose all buffs when they die. You'd have to store the "buff" as a variable with an indexing system or in a hashtable, or just use a damage detection event to determine when the buffed hero would take fatal damage. Or you could possibly just use Reincarnation in a hidden spellbook.