You can cast a card for its miracle cost only as the miracle triggered ability resolves
Toss in a haste enabler so that the creatures you cast off the top of your library can tap for mana to keep the engine rolling and youll take turns long enough to rival the storm players

Sliver Swarm Commander (1) Creatures (43) Crystalline Sliver Winged Sliver Clot Sliver Shifting Sliver Blade Sliver Synapse Sliver Brood Sliver Quick Sliver Crypt Sliver Hibernation Sliver Bonesplitter Sliver Firewake Sliver Gemhide Sliver Harmonic Sliver Might Sliver Two-Headed Sliver Necrotic Sliver Sinew Sliver Bonescythe Sliver Blur Sliver Sentinel Sliver Striking Sliver Megantic Sliver Galerider Sliver Syphon Sliver Manaweft Sliver Constricting Sliver Sliver Hivelord Diffusion Sliver Venom Sliver Lavabelly Sliver Hollowhead Sliver Cloudshredder Sliver Spiteful Sliver Cleaving Sliver Realmwalker Rukarumel, Biologist Capricious Sliver Hatchery Sliver Lazotep Sliver Regal Sliver Taunting Sliver Titan of Littjara Instants (1) Sorceries (10) Windfall Decimate Harsh Mercy Nature's Lore Three Visits Farseek Distant Melody Cultivate Cleansing Nova Crippling Fear Enchantments (1) Artifact (7) Sol Ring Fellwar Stone Vanquisher's Banner Herald's Horn Pillar of Origins Icon of Ancestry Arcane Signet Lands (37) Forest x3 Plains x2 Swamp x2 Mountain x2 Island x2 Rocky Tar Pit Mountain Valley Grasslands Flood Plain Jungle Shrine Savage Lands Seaside Citadel Exotic Orchard Command Tower Nomad Outpost Mystic Sanctuary Sandsteppe Citadel Opulent Palace Frontier Bivouac Prairie Stream Sunken Hollow Smoldering Marsh Cinder Glade Canopy Vista Ash Barrens Irrigated Farmland Sheltered Thicket Scattered Groves Path of Ancestry Unclaimed Territory Secluded Courtyard Commander, Theme, and Strategy The deck title says it all

so just having an Army - any Army at all - can serve as a kind of pseudo-haste for a future, bigger, one
MSC #199 #434 FDN #725 BLC #271 CMM #387 #605 BRR #17 #80 40K #239 DOM #215 Alchemy, Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Pioneer, Standard, Timeless, Vintage Pauper
Whether you're bringing back interaction, a tutor, or a counterspell, I don't think you'll ever feel sad about including this card in your deck