Guess that card

none of those

I will consider the fact the game has been frozen for so long a victory over rjuto and proceed to post an additional clue.

"... but you are not going to get my power without a sacrifice."

So I'll take over.

Once forbidden, I have returned;
I shall in turn banish friend and foe alike.

Black Luster Soldier-Envoy of the Beginning?

Yep

I'm the little brother of one of your greats
But I only direct it to one foe; one foe I direct my hate

Shooting Quasar Dragon - attacks more than once which can attack 2 different monsters
Shooting Star Dragon - can also attack more than once if tuners were revealed.
Stardust Dragon?

Since it only has the effect to negate 1 card and it can only attack once?

No.

Ryko, Lightsworn Hunter?

After all, the attack is directed back...

No. I suppose it's time to show a little hint:
Make my bro from the stars
Of monsters that are not set that far apart

Another hint I guess and it's going to be blunt.

I'm a level 3 effect monster.

Core Destroyer?

That is correct. You may post a riddle now.

The last one I posted wasn't solved, so either try that one (page 22) or someone else post a new one, whatever happens first.

Caius The Shadow Monarch?

Bugman C?

Well, if you are still feeling like trying, here's another clue. It's a spellcaster.

Magical Scientist?

nope

I had to post not just clues but its friggin artwork for you people to get it... Yeah, it's cybernetic magician.

By discarding (losing one) you either make one of your monsters strong or make one of the opponent's monsters a 2k, therefore weaker than cybernetic himself therefore able to be taken out by him.