Etali, Primal Storm

Variance as a payoff, not a cost. Most "cast spells for free" effects from libraries (Possibility Storm, the cascade family, the various impulse-draw engines) pull from your own deck, where you control the floor and the ceiling. This one widens the funnel to every player's library, including the opponents', which is the whole pitch: you are not casting your cards, you are casting whatever the game decides to hand you, and in a multiplayer pod that pool is large and unpredictable by design. The attack trigger is what makes the gamble worth taking. A 6/6 has to commit to combat and survive a turn to fire, so the body and the engine are deliberately fused: you cannot tuck the effect away at instant speed or chain it cheaply, you have to send a sizable creature into the red zone and live. The reward scales with how slow and grindy the table is, because a deeper average top-of-library means fatter spells flipped for nothing. What it does not do is guarantee anything; you might exile three lands and a Negate you cannot use, or you might flip a haymaker off each opponent and snowball the whole turn. That swing, the range between whiff and blowout, is the entire identity. It is a haymaker that asks you to trust the shuffle and swing anyway.