This means more back and forth plays between players rather than the game being over after a turn or two
Competitively, Ogerpons Teal Dance ability is its greatest asset, allowing players to attach a Grass energy from their hand and draw a card in the same turn
Machina Gadget 3 Gadgets 0-2 Machina Cannon 2-3 Machina Fortress 3 Machina Gearframe 3 Offering Machina engine is more resilient to monster-heavy hands as Fortress is a recurring threat that can put the excess Gadgets to use either from the hand or graveyard
Those are the MTG creature types that the first two Ixalan sets were built around, and they're less of a focus for Lost Caverns of Ixalan
This hinders a lot of the good cards in the deck, like Triple Tactics Talent, Stardust Charge, and Coral Dragon
In the unusual case where two or more cards are exiled face down with The Creation of Avacyn's first chapter ability (likely because the triggered ability was copied or the ability triggered a second time), the second chapter ability will turn all of the exiled cards face up