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Swiftfoot Boots Swiftfoot Boots is the slower, cheaper Lightning Greaves

Suspend cards also have inherent synergy with cast-from-exile payoffs, so Id definitely prioritize Search for Tomorrow in a Faldorn, Dread Wolf Herald deck

Aang, at the Crossroads's delayed triggered ability won't cause it to transform back into Aang, at the Crossroads if it has already transformed into Aang, Destined Savior, perhaps because several creatures left the battlefield in one turn

TLDR MTG fetch lands trade 1 life (and some shuffling) to fix your colors, fuel synergies, and make greedy mana bases actually function

So, the tricky thing here is that youre basically never going to play Acererak on turn three, like one wants to do

If you want to get really spicy with this card, pair it with Spurnmage Advocate for the a play that the whole table will remember