amplifier

I've been learning more and more about the damage engine, but I've encountered a problem that I don't know how to solve. I want to amplify a healing. So far I know how to amplify damage, either magical or normal, but I haven't been able to amplify a healing, either by a priest or the paladin's...

Please, I want just a Megaphone icon for my map. (Item) Preferably not red, black, gray or maroon and without a wire. Most preferably orange with white stripe in the middle. (Reference image: just an example)...