Nope... Both XH and Xemnas had orange eyes...
Ah. Alrighty.
Well, that attack is similiar to the attack Xemnas uses before Sora runs up Memory Skyscraper... Just modified...
Except he used a bow and arrow, and you had no way out of it save for choosing the right command from a rapidly scrolling command menu. You're making too much of a connection out of nothing. <.<; Sure it might've used crystals surrounding Sora for both things, but there are also a lot of attacks in the game where crystal-ish things are used. Terra's attack is individual to him because
1. He transformed his key into a bow, a riding bike thing, a gun, etc.
and 2, honestly, just because the actual attack looks similar, does NOT mean they automatically pulled it and modified it from something else. That'd be like saying, for instance before we knew about the Organization that they're actually a bunch of phantoms like the secret boss in Kh1, or that thats where Nomura got the coat idea.
Sure they're both dark cloaks but that doesn't mean they were taken and modified from the Phantoms.
Sure Terra's attacks look similar to others (and by attacks I mean the actually produced thing, ex: the ball o' doom, the crystals, the effects basically) that doesn't mean they were taken and modified. I don't know one enemy in the entire game thus far that has used a bow and arrow as a weapon. So Terra transforming his keyblade into all those things, a gun, a whip, a bike (dunno what else to call it), a bow, is original to him.
I'm thinking the DS is either a Terra replica or his twin...
If so, then it would explain many things...
Another thing I saw, in Nomura's drawings for them (the big one with all three games on it) the DS and Terra are drawn almost exactly the same...
Hm. I suppose that could be. Could explain who he's talking about in that one screen where he's saying something about "What did you do to his/her heart?" Couldja post a link to that picture perhaps?