It's in black and white in the release notes. It's in black and white on twitter…
And still there's a lot of discussion, and some gut-calls from good sources that end up being wrong so…One more time in black and white here (stated clearly, I mean), if you please…
I cast
Gigantoplasm and select my opponent's God card. I don't have enough devotion, so Gigantoplasm is not a creature. I activate his ability for a “X: This ~object~ has base power and toughness X/X.”
There's no responses. The ability resolves while Gigantoplasm is still not a creature.
A) The ability fails to create any CE at all when it resolves? (So it's NOT there waiting to apply later should I gain devotion?)
B) This is because CR609.3 giving a non-creature a base P/T is an impossible action, therefore so is creating a CE that does so? -or are there better rules to cite for what's happening here?
C) This works altogether differently from CE's that don't set _Base_ P/T, but just give a boost. Boost CE's still get created, but Base P/T CE's cannot be created. For example
Silumgar's Command Dropping devotion before awarding a minus-boost. Or the corollary already answered here
http://apps.magicjudges.org/forum/topic/18706/(The release notes example was 98% clear already, but the other 2% was more in the vein of "Well if they're talking about a manland, it will likely timestamp over this CE, so that's enough reason to not talk about it. Plus yes, it's more important to point out it doesn't become a creature).
Thanks for your indulgence. Having it here will shorten-up discussions. Especially what rules apply.