You get the most use out of your lands with the fun LCI card, Spelunking which brings your lands into play untapped
With three Standard-legal UB sets, WotC is planning on making a change to in-universe sets that may go both ways in terms of reception
Kethek, Crucible Goliath works in reverse, sacrificing more powerful creatures to get smaller ones
About which packs to buy, actually it does not matter that much since the probability of getting what you want is low, but, to maximize it, Id recommend getting Amonkhet for Hazoret the Fervent, Glorybringer, Ahn-Crop Crasher, Magma Spray and Sunscorched Desert
So Mike changed the cards such that they gained a counter every turn and whenever an arcane or spirit spell was played
No player has time to react between token creation and equipment attaching