Edge of Eternities is a laudably weird set, and its colorless cards embrace that ethos: there's a new Eldrazi that has a pseudo-Solemn Simulacrum effect, there's a 9/9 that you can cast for three, there's a card that casts Hive Stirrings every turn, and there's a Mindslaver variant with an Emrakul-sized activation cost
You may discard your hand (it lets your foes do the same) and then draw card equal to your highest mana cost for your leader
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From there, you can use the escape ability to cast it again
DUNEBLAST Duneblast sees significantly more play than most cards that show up in these articles, but its still being really underrated
Nicol Bolas, the Ravager / Nicol Bolas, the Arisen Just 4 mana gets you Nicol Bolas, the Ravager and immediately forces your opponents to discard