Re: i need some more help.

I'm pretty sure you can do that. Here's what the rules say:

"To play a Mugic Card, check if it has a tribal affiliation. If it does, then remove Mugic counters from a Creature you control of the same Tribe equal to the number of Mugic symbols on the card. If the Mugic Card is Generic, you may remove the appropriate number of Mugic counters from a Creature of any Tribe."

It doesn't seem to mention anything about having to use counters from your Engaged Creature to use Mugic, just that when you want to play mugic, you take counters from any creature as long as the Creature you take them from is part of the same Tribe as the Mugic.