Powering Up the Gremlins

If you have the boons to make crazy-awesome hybrid creatures (the 9-dots of Animal, Chaos, Fertility, and Health), then what do you need in order to give them cool powers? F'r example, if your Scion wants to make a species of craftsbeings for their pantheon comparable to dwarves or tengu, or if you want to make fire-breathing jaguarmadillos or make trees that are immune to lightning and capable of storing the electricity from lightning strikes to use on enemies. How do you make that work?

Tough question.   I wish I could give you a better, straighter answer, but I really think its gonna have to be on a case by case basis.  Its definitely something you are able to do with those level 9 powers.  But its something that has to be handled delicately.  And since there are an infinite number of ideas you could add to these creatures, a system either isnt gonna work, or is gonna take forever to come up with.

So some thoughts Id have if someone was bringing this to me.
How powerful does that make the creature.  What legend are they probably?
Is the power something that the maker of the creatures is god of?
Are these creatures going to earth on masse?  How will that effect humanity?
How many of these creatures are getting this power?
How often and fully to they breed?


Id add a legend cost, probably starting at the same cost again of the creating them boon.  And depending on how powerful they are, or more importantly how many of them are, MAYBE add a permanent willpower to give them this permanent power.
Actually, the more I think about it, the more likely the permanent willpower is.  

Then probably some mechanic about when they spend legend, you get fatebounds to their creation story until you have a full cult that remembers you created these beings.

I know that probably wasnt the straight answer you were looking for....sorry.  But theres just too many variables.  Its the kinda thing I could work on with a specific example.  But its also one of the things that I spend a lot of time on as an ST and cant kinda do on a massive for everyone scale.