Creatures - 20 Hada Freeblade x 3 Kazanadu Blademaster x 3 Halimar Excavator x 4 Jwari Shapeshifter x 4 Harabaz Druid x 2 Qasali Pridemage x 4 Support Spells - 14 Aether Tradewinds x 4 Canopy Cover x 4 Summoning Trap x 2 Marshal's Anthem x 2 Join The Ranks x 2 Lands - 26 Sejiri Steppe x 4 Halimar Depths x 2 Stirring Wildwood x 2 Seaside Citadel x 4 Terramorphic Expanse x 4Island x 4 Forest x 4 Plains x 2
I'm not an expert at magic since i started playing recently but i would take out 2 terramorphic expanses and add 2 more plains since white is a major color in your deck. Also amulet of vigor would be helpful since alot of your lands come into play tapped so take out sejiri steppe for a couple.
