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You can spend your mana on whatever interaction you need to survive or gain advantages

(Junky lands like Ghost Town were too weak to do anything, but realistic answers have always been sought after.) Drownyard Temple is a great answer

Combine that with Encroaching Dragonstorm, which has an enter-the-battlefield trigger that lets you search your deck for your two basic lands, and you get two 4/4 Dragons

If you run out of cards in library just venture through Tomb of Annihilation to finish the job

MtG Assassin's Creed Mythic Rare Yggdrasil, Rebirth Engine to exile the top three cards of your library, fueling your game plan

So let's eschew synergy in favor of raw power