Forum:Don't really know where to put this: XYZ effects

So I have Grenosaurus (Dinosaur deck), and I was just confused about XYZ materials, specifically, can you keep adding materials if you use both cards? EX: 2 cards under this XYZ card, I use both cards for the effect, and then I just can't use the effect anymore? Or can I add more materials to it to keep using it's effect? Also when I summon it, can I use it's effect, or attack with it, or do I have to wait a turn?

-Setari (talk • contribs) 08:34, September 21, 2013 (UTC)