Raise Max reduces the power of an opponents Character by 3,000, making it easier to KO through an attack or an effect
I suspect four is going to be the standard
Even a card like Greater Good can be turned into a self-mill piece so long you have enough creatures to sacrifice and cards to discard, though it might not have been on your radar in regards to self-milling before
The starting player becomes the controller of the active plane and at the beginning of each player's turn, that player becomes the new controller of the active plane, even if it doesn't belong to their planar deck, thus making planes affect all players equally
Yes, there are a handful of white cards that draw you cards when your creatures die, though they all have conditions like being equipped, having a +1/+1 counter, or costing
Players will be able to purchase Alchemy boosters either individually for 1,000 gold or fifteen for 3,000 gemsthe same price as Standard set boosters