Wrenn's Resolve + Reckless Impulse + Light Up the Stage The trifecta of Wrenn's Resolve, Reckless Impulse, and Light Up the Stage should be in virtually every cast-from-exile deck, for these are the most efficient draw spells in the archetype
those that did are powerful, dangerous, or both
Is that your only trick, Chandra? Nicol Bolas Illustrated by Kieran Yanner Standard Not Legal Alchemy Not Legal Pioneer Legal Historic Legal Modern Legal Brawl Legal Legacy Legal Comp
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And, on top of all of this, it doesn't require any other card to function, as it will also draw you the permanent you need for the second part of its trigger
But it's only playable as a one-off in Vintage (and formats that follow the Vintage ban-list, like Canadian Highlander), so we're giving the spot to Gaea's Cradle