I don't often say this about double-strikers; but this seems weak. That's a heck of a casting cost for a pretty small creature than can be kicked with an obscene total cost into being a kinda pretty-good angel.

Hmm I'll tweak the costs a little.

Hmm. Now it's a rare Wild Griffin if you don't kick it, which is pretty horrible - couldn't it at least be a Leonin Skyhunter? But if you do kick it, it's pretty respectable: 4/4 flying double strike trample, equivalent to 8/4 flying trample, for 6 mana (in very painfully specific colours) - that's fine at rare.

I guess it's one of those kicker cards like Dralnu's Pet or Phyrexian Scuta where the unkicked version is horrible and not something you'd ever want to use unless you were really low on mana / life.

I do want to push people to nearly always play the kicked version but I agree that the non kicked cost is still a little high.