The format is not supported in Magic: The Gathering Arena currently, but instead uses the Explorer format in the game
Vigilance enablers, as they don't make you lose less life, they make you be able to attack more freely
Emrakul, the Promised End Emrakul, the Promised End is an absolute showstopper, not only being a 13/13 for 13 mana but also giving you the ability to play your opponent's next turn
Alchemy will join Standard and Historic as constructed formats on the client, but is not replacing anything
14 Tom Bombadil The poster art for Tom Bombadil is actually closely in line with the original art from the main set, which works in its favor
Constantly looting twice a turn cycle will absolutely improve the quality of your hand and help dig to other win conditions, even if you arent playing him with second-draw synergy cards like Jolrael, Mwonvuli Recluse (hint: you should)