Question on skins

i was wondering how the units like the nether drake, the spirit woves, the avatar of vengeance, and other transparent units work or how there skins work. Is it possible to tint their skin or model or even color them in so they arent transperent

another question i have is how the parts of the unit that take the color of the team work, and if it would be possible to make more of a unit have more of itself colored in its teams color

another question i have is how to change the balls floating around the blood mage or how to change the things floating around the elven towers

1. no, that would require mdl editing

2. doesnt make sense

3. no you cant change the elven tower thingies, theyre in the model, and the blood elf things, i.... dont....... know