When encountering an enemy hero, there is a chance (5% + 1% per 5 hero levels) that they will switch to your side.
An ability purely for Multiplayer
Added after 2 minutes
Someone has to be with Darkness. High-initiative griffins for Iris and a general slow on neutrals is a good combo.
Or cast a debuff and fly away into the heavens.
In that case, Iris becomes a true death machine, because by level 15, griffins already become hard to kill.
But it's an excellent combo, indeed.
