If you do, Thief of Existence gains "When this creature leaves the battlefield, target opponent draws a card." Creature - Eldrazi Yavimaya Granger Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.) When this creature enters, you may search your library for a basic land card, put that card onto the battlefield tapped, then shuffle
If an effect allows you to play a specific modal double-faced card, you may cast it as a spell or play it as a land, as determined by which face you choose to play
When I considered what I normally do against a control meta in other formats, I realized the reliable old standby: Red Deck Wins
That seems odd
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Its introduction signifies the series' shift towards more complex narratives and multidimensional exploration