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You can use the mana generated by your mana elves to cast it and give your army a big Overrun effect

you can play cards from the top of your deck with Falco Spara, PactweaverFalco Spara, Pactweaver, draw cards from The SwarmlordThe Swarmlord, make huge Hydras with Zaxara, the ExemplaryZaxara, the Exemplary, or dea damage with Shalai and HallarShalai and Hallar

It only needs a few turns to become a serious threat, especially with cards that care about counters

Brawl Not Legal Vintage Legal Timeless Not Legal Commander Legal Pauper Not Legal Oathbreaker Legal Penny Legal Castle Locthwain Land This land enters tapped unless you control a Swamp