Postby phlip » 25 Sep 2012, 23:18
Yeah, the DCI registration doesn't take much... you just fill in a form (which is just name, address, email, maybe 1 or 2 other things I forget), and they set you up in their system (just a couple of minutes) and give you a card with your DCI number on it. It's worth showing up 5 or 10 minutes early to make sure you're not putting extra pressure on the organiser, but it's not like you need to get there hours in advance, or anything.
Re sacrificing: when the sacrificing is part of the cost of the spell or ability, as it is for all three of the things you mentioned, then you actually sacrifice the creature as part of casting the spell or activating the ability... so by the time that is done, and you go to activate/cast the next one, the creature's already in the graveyard, so you can't sacrifice it again.
If sacrificing was part of the effect of the spell/ability, then you might get to do some fancy stacking tricks, but it would depend how the effect was worded, which would change how it would react if the creature you wanted to sac wasn't there when it resolved... maybe the spell would be countered (if that was the only target), or maybe it would do nothing (say, "sac target X; if you do, Y"), or maybe it would work fine and you'd have gotten some extra value. Or maybe you'd have to sacrifice something else instead (say, if the creature you had to sacrifice wasn't chosen until resolution). Depends on the spell/ability in question.
While no one overhear you quickly tell me not cow cow.
but how about watch phone?
[he/him/his]