Thanks everyone for your replies.
poke6809 :
Haunting Hymn seems sweet, but a little mana intensive. I'll give it a try !
Slyvester12 :
Blade of Selves doesn't fit with the theme of the deck, even if would be really devastating, but as mentioned, the deck is a Themed deck
Judaspriester : I totally forgot about
Library of Leng !! For the lands, as i said, It fits with the theme, so I don't really care if it comes into play tapped.
Anyway, again, thanks for your feedbacks, I had no idea that this list could be interesting to someone haha.