If I ultimate {Lilliana Vess}. (GY bring back) an there is a {Grafdiggers cage} out. What happens?
You paid the cost (loyalty counters), but the spell bombs because of the cage. So you end up with a dead liliana and a number pf creatures on your side identical to the amouny you already had ;)
That's what I thought. The good thing is, I dont require her ultimate to go off, in the deck I have her in.