Strike me down
And you won’t stop the unstoppable 
Forum Game: Riddles
Was a good show, but was also a parody of dragon ball in my opinion.
Never watched it. The only thing I know is “over9000”
Dragon Ball is basically a super slowed down version of Lagann except with martial arts and no spaceships. Also wins 1st place for anime with most filler with naruto shippuden placing 2nd.
Mexhaz0r!
Eclipse
Correct. 
I look large and ancient
But I am possibly not
3 turns i give you to stop me
Because after that
Spines shall be shot
Swarm shall reign supreme
And all will be done because of my help
Gate to the Undervault?
No. It has no spines
Makes me think of Gigaloth, but
Means it probably isn’t because he has only build 2.
It is gigaloth. I thought he was build 3. Sorry.
A real easy one:
I am big and strong
But looked down unto
But in a game of chess
I am very important
Rook
15characters
That was easy, it’s the mighty Rook 
Edit: Epicflygon beat me at it.
Hahaha
I left here and instantly realised what it was, I saw you posting so you can see it was really rushed.
Yep both are right
Take for example
the way that I rule.
Built on the backs of those odd little fools.
By the time that you dance to my tune
you will see,
I am weaker than you
Zenrui, the blightspawned?