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
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
Koh, the Face-Stealer is a big 2-for-1 with a bizarre activated ability
Notably, becoming basic also doesn't grant any of the basic land types
Where Do Plane Cards Exist
Available at game stores now, it provides several much-needed cards that boost the viability of several decks other than the dominant Ruby/Amethyst control deck