Avatar with bigger or smaller size

I tried this:

A unit begins casting spell blah

casted spell blah avatar

Animation - scale unit to 5 times normal but it didnt work.

Why?

Theres a problem with changing the scale size with Avatar activated. I would suggest hiding the casting unit and replace it with a larger one but with the same experience and spells. This can all be done with triggers.

You can also make a fake avatar based from metamorphosis.

You mean use metamorphosis and just have the model be a bigger unit instead of the black demony thing?

Speaking of which, since morphed DH and normal models are grouped together, how do I make a unit with morphed model as his normal?

Add animation tag to unit: alternateex

Ok, thanks.