XX Spells

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An XX cost (not X) theme deck.
• XX costs (in casting cost or ability)
• Lots of mana ramp
• The Sliver Queen is pretty generic; this could be Kenrith instead. I put in some ramp that is very good with Silver Queen, such as Mana Echoes, Earthcraft, Manaweft Sliver.
• At first, I was allowing Multikicker spells, but there's enough XX spells now that I don't have much of this left.
 
Mana Acceleration (23): General (1): Spells (28): Sideboard (Omitted/Cut card ideas):
1 Astral Cornucopia 1 Sliver Queen 1 Orochi Hatchery 1 Dragonrage
1 Cryptic Trilobite   1 Panacea 1 Battle Hymn
1 Doubling Cube Creatures (12): 1 Whetwheel 1 Black Market
1 Elementalist's Palette 1 Hangarback Walker 1 Dark Salvation 1 Sorcerer Class
1 Everflowing Chalice 1 Walking Ballista 1 Empty the Pits 1 Zhur-Taa Ancient
1 Mirari's Wake 1 Deepfire Elemental 1 Entreat the Dead 1 Dictate of Karametra
1 Rosheen Meanderer 1 Plaguebearer 1 Folio of Fancies 1 Heartbeat of Spring
1 Xenagos, the Reveler 1 Hydra Broodmaster 1 Hour of Eternity 1 Mana Flare
1 Zaxara, the Exemplary 1 Neverwinter Hydra 1 Mass Manipulation 1 Kinnan, Bonder Prodigy
1 Circle of Dreams Druid 1 Numa, Joraga Chieftain 1 Spell Contortion 1 Floodwater Dam
1 Citanul Hierophants 1 Polukranos, World Eater 1 Exponential Growth 1 Chalice of the Void
1 Cryptolith Rite 1 Flametongue Yearling 1 Full Flowering 1 Voodoo Doll
1 Earthcraft 1 Gorilla Shaman 1 Gelatinous Genesis 1 Part Water
1 Gemhide Sliver 1 Orcish Settlers 1 Pest Infestation 1 Recall
1 Growing Rites of Itlimoc // Itlimoc, Cradle of the Sun 1 Warbreak Trumpeter 1 Strength of the Tajuru 1 Hydradoodle
1 Manaweft Sliver   1 Wildest Dreams 1 Marshal's Anthem
1 Mana Reflection   1 Bonfire of the Damned 1 Quag Vampires
1 Nyxbloom Ancient   1 Builder's Bane 1 Enclave Elite
1 Unbound Flourishing   1 Conflagrate 1 Gnarlid Pack
1 Zendikar Resurgent   1 Crackle with Power 1 Joraga Warcaller
1 Regal Behemoth   1 Fall of the Titans 1 Skitter of Lizards
1 Vorinclex, Voice of Hunger   1 Meteor Shower 1 Apex Hawks
1 Mana Echoes   1 Release the Gremlins  
    1 Street Spasm  
Lands (36):   1 Decree of Justice  
1 Taiga   1 Entreat the Angels  
1 Savannah   1 Quarantine Field  
1 Bayou   1 Starnheim Unleashed  
1 Tropical Island      
1 Crumbling Necropolis      
1 Arcane Sanctum      
1 Savage Lands      
1 Seaside Citadel      
1 Jungle Shrine      
1 Opulent Palace      
1 Sandsteppe Citadel      
1 Nomad Outpost      
1 Frontier Bivouac      
1 Mystic Monastery      
1 Zagoth Triome      
1 Indatha Triome      
1 Savai Triome      
1 Ketria Triome      
1 Raugrin Triome      
1 Blast Zone      
1 Command Tower      
1 Exotic Orchard      
1 Gaea's Cradle      
1 Path of Ancestry      
1 Treasure Vault      
1 Swamp      
1 Island      
5 Forest      
2 Mountain      
1 Plains      
1 Sol Ring