What's the use of a Grail? (Patreon)

If you forgot how it works - then Ainz just got new Grail and now it can be used in 3 different ways exactly:   

1 - It's used as a catalyst to summon YGGDRASIL Servant... One that was previously mentioned.    

2 - It's used as a catalyst to summone FGO Servant... One that previously did not appear in FGO plot and might not appear even in FGO canonical main story even.    

3 - Grailing time. Some other Servant that Ainz already has recieves Grailing - and sudden power-up.   

Though it's not just as simple, because other than Patreon, I also have some people on my boosty voting too, and they votes are as valuable as yours. So if suddenly there is a choice  that wasn't supposed to be here - well, that's why.    

Voting starts now and ends at the 19th September. So, go ahead, choose your destiny!