Modular 4 Color

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Click here for my EDH Commander decks
 
Reyhan+Akiri suggest a deck around the "Modular" mechanic. Sacrificing Modular creatures one after the other with a Doubling Season effect out can generate a gigantic creature.
• Creatures that use and/or give counters
• Sacrifice effects
I'm considering cutting Akiri (and thus Red and White) from the deck, and replacing with Slurrk, All-Ingesting or Nadier, Agent of the Duskenel.
Or I could use Sakashima of a Thousand Faces (which would add Blue), and then I could add some copy effects to have multiple Reyhans.
 
Mana Acceleration (12): General (2): Spells (8): Sideboard (Omitted/Cut card ideas):
1 Crystalline Crawler 1 Reyhan, Last of the Abzan 1 Helm of the Host 1 Bloodtracker
1 Liquimetal Torque 1 Akiri, Line-Slinger 1 Lithoform Engine 1 Thought Gorger
1 Workhorse   1 Strionic Resonator 1 Lifeblood Hydra
1 Gyre Sage Creatures (42): 1 The Ozolith 1 Wildwood Scourge
1 Marwyn, the Nurturer 1 Arcbound Bruiser 1 Branching Evolution 1 Necropolis Regent
1 Jiang Yanggu, Wildcrafter 1 Arcbound Crusher 1 Death's Presence 1 Korozda Guildmage
1 New Horizons 1 Arcbound Fiend 1 Doubling Season 1 Juri, Master of the Revue
1 Rishkar, Peema Renegade 1 Arcbound Hybrid 1 Cathars' Crusade 1 Triskelavus
1 The Great Henge 1 Arcbound Lancer   1 Iridescent Hornbeetle
1 Viridian Joiner 1 Arcbound Overseer   1 Nadier, Agent of the Duskenel
1 Zendikar Resurgent 1 Arcbound Ravager   1 Elenda, the Dusk Rose
1 Runaway Steam-Kin 1 Arcbound Reclaimer   1 Hangarback Walker
  1 Arcbound Slith   1 Vigor
Lands (36): 1 Arcbound Stinger   1 Marionette Master
1 Boros Garrison 1 Arcbound Wanderer   1 Pentavus
1 Golgari Rot Farm 1 Arcbound Worker   1 Minion Reflector
1 Gruul Turf 1 Etched Oracle   1 Conclave Mentor
1 Orzhov Basilica 1 Mindless Automaton   1 Winding Constrictor
1 Rakdos Carnarium 1 Scrapyard Recombiner   1 Pir, Imaginative Rascal
1 Selesnya Sanctuary 1 Triskelion   1 Tetravus
1 Savage Lands 1 Walking Ballista   1 Thopter Squadron
1 Jungle Shrine 1 Zabaz, the Glimmerwasp   1 Loyal Guardian
1 Sandsteppe Citadel 1 Arcbound Shikari   1 Barrage Tyrant
1 Indatha Triome 1 Ayli, Eternal Pilgrim   1 Bloodshot Cyclops
1 Savai Triome 1 Brion Stoutarm   1 Sword of Truth and Justice
1 Agadeem's Awakening // Agadeem, the Undercrypt 1 Corpsejack Menace   1 Evolution Sage
1 Bala Ged Recovery // Bala Ged Sanctuary 1 Jarad, Golgari Lich Lord   1 Shalai, Voice of Plenty
1 Bretagard Stronghold 1 Spiteful Squad   1 Greater Good
1 Command Tower 1 Bloodspore Thrinax   1 Primal Vigor
1 Gavony Township 1 Kalonian Hydra   1 Altar of Dementia
1 Grim Backwoods 1 Servant of the Scale   1 Cauldron of Souls
1 Hagra Mauling // Hagra Broodpit 1 Steelbane Hydra   1 Solarion
1 High Market 1 Vastwood Hydra   1 Ghoulcaller Gisa
1 Karn's Bastion 1 Vorinclex, Monstrous Raider   1 Mage Slayer
1 Kazuul's Fury // Kazuul's Cliffs 1 Arcbound Slasher   1 Surestrike Trident
1 Khalni Ambush // Khalni Territory 1 Arcbound Tracker   1 Selvala, Heart of the Wilds
1 Malakir Rebirth // Malakir Mire 1 Arcbound Whelp   1 Kresh the Bloodbraided
1 Miren, the Moaning Well 1 Goblin Razerunners   1 Vish Kal, Blood Arbiter
1 Mosswort Bridge 1 Kilnmouth Dragon   1 Ooze Garden
1 Ondu Inversion // Ondu Skyruins 1 Preyseizer Dragon   1 Miren, the Moaning Well
1 Path of Ancestry 1 Stalking Vengeance   1 Proper Burial
1 Sejiri Shelter // Sejiri Glacier 1 Shaile, Dean of Radiance // Embrose, Dean of Shadow   1 Disciple of Griselbrand
1 Shatterskull Smashing // Shatterskull, the Hammer Pass 1 Arcbound Javelineer   1 Feed the Pack
1 Song-Mad Treachery // Song-Mad Ruins 1 Arcbound Mouser   1 Blightsteel Colossus
1 Spinerock Knoll 1 Arcbound Prototype   1 Gemini Engine
1 Turntimber Symbiosis // Turntimber, Serpentine Wood 1 Star Pupil   1 Cultivator of Blades
1 Valakut Awakening // Valakut Stoneforge     1 Inkmoth Nexus
1 Vastwood Fortification // Vastwood Thicket     1 Spinal Parasite
1 Windbrisk Heights     1 Spincrusher
1 Sol Ring     1 Falkenrath Exterminator