So, the tricky thing here is that youre basically never going to play Acererak on turn three, like one wants to do
Swiftfoot Boots Swiftfoot Boots is the slower, cheaper Lightning Greaves
TLDR MTG fetch lands trade 1 life (and some shuffling) to fix your colors, fuel synergies, and make greedy mana bases actually function
Where Do Plane Cards Exist
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
Koh, the Face-Stealer is a big 2-for-1 with a bizarre activated ability