Elder-Dragon Highlander (EDH) Dragon Themed- Deck Review?

here is my EDH deck, what improvements can I make. I wanted this deck to also be a collection as well as something fun to play with.

Commander

Scion of the Ur-Dragon

Elder Dragons

Nicol Bolas

Acades Sabboth

Chromium

Palladia-Mors

Vaevictis-Asmadi

Premevals

Darigaaz the Igniter

Rith the Awakener

Treva the Renewer

Dromar the Banisher

Crosis the Purger

Chaos Primevals

Vorosh the Hunter

Oros the Avenger

Teneb the Harvester

Numot the Devastator

Intet the Dreamer

Dragon Stars

Kiega the Tide Star

Ryusei the Falling Star

Yosei the Morning Star

Jugan the Rising Star

(Kokusho the Evening Star is banned sadly but i still have him : / )

Other Dragons

Bladewing the Risen

Karrthus the Tyrant of Jund

Niz-Mizzet the Firemind

Melfegor

Teeka's Dragon

Skithiryx the Blight Dragon

Dragon Master outcast

Rorix Bladewing

Planeswalker dragon summoners

Sarkahn Vol

Sarkhan the Mad

Zirilan of the Claw

Progenitus (not a dragon but just for fun)

Cards to Play Dragons With

Defense of the Heart

Green Sun Zenith

Elvish Piper

Norwood Priestess

Concordad Crossroads

Tooth and Nail

DragonStorm

Quicksliver Amulet

Hypergenesis

Animal Magnetism

Belbes Portal

Cryptic Gateway

Zoologist

Through the Breach

Impromptu Raid

Dragon Arch

Sneak Attack

Foster (still need to get this one)

Zirilan of the Claw could go here also

Control

Captain Sisay

Goblin Spy

Reki, the History of Kamigawa

Crucible of Fire

Haste

Fires of Yavimaya

Fervor

Lightening Greaves

Mana Acceleration and Versatility

Joiner Adept

Bird of Paradise

Seething Song

Harrow

Kodamas Reach

Ancient Ziggurat

Untaidake the Cloud Keeper

Obelisk of Naya

Obelisk of Jundt

Dark Ritual

Ancient Tomb

City of Traitors (might need this one im not sure)

Llanowar Elves

Rofelilos Lannowar Emmisary

Fyrndorn Elves

Joraga Treespeaker

Greenweaver Druid

Everything else is basic mountain or basic forest lands

thoughts?