This is a cool Idea, but you're gonna wanna add in more than Just Blightsteel, There are a lot of good options to chose from, Guile Darksteel Colossus It That Betrays <--Personal Favorite Worldspine Wurm I would chose 4 or 5 So that you don't Draw the only one you have, I mean you could always just add in some extra Blightsteel Colossus but it's up to you. +1 for a cool idea though.

Also, Isamaru, Hound of Konda would love a home here.

Hey! thanks a lot! I will think and test, I know about having another big guy but first I wanted to know how having this many legends would work... which I still don't know XD still feels a bit delicate.

Young Wolf ? It comes back so you can polymorph it again.

Thanks a lot Nefferean but I'm using Polymorph to represent Jalira, Master Polymorphist from M15 since it's not available at this page yet (but I left the link to see it in the description), and well, young wolf would interfere with Jalira's effect and the whole point of the deck.

I really love the idea. You definitely need more non-legendary fatties and some counter/fog/return to hand spells for controlling the game. Maybe also Reki, the History of Kamigawa or Rafiq of the Many ?

oh sorry didn't realize her effect was non-legendary x.x My bad!
I read it a while ago x)
Azusa, Lost but Seeking then, maybe?

Unique, +1. I def see this going somewhere...