Here's page 50 of Fusion #16, and it seems there may be some side-effects of fusing matter from outside Fusion's multiverse. Bob first mentioned such possible problems back on page 27 of this issue.
Crossoverkill was still in their multiverse (various universes in their multiverse). The Space Out of Time is beyond all multiverses (see Bubble Theory diagram posted earlier).
First thought: The Elder might not like getting stung, what if it shakes its "hand" violently? Which could mean anything... even staying still for some time because it's so huge...
Next thought: What if the Elder's skin is neither matter nor energy, but some kind of status anywhere in between? This ideamight be already out the window because Fusion is fusing something but I still like the outerworldly weirdness.
Best case scenario: POWER UP!!!
Worst case scenario: I'd rather not think about it
My guess: Temporary power disruption (not disabled just temporarily altered, for better or worse)