Then the 6/6 flyer arrives
Most of the time, we dont care about 2-drop walls that do nothing but block, but it feels free when you get a card out of the deal, and it can also synergize with anything that might let you reuse the ability
40 is the threshold you want to reach, so you don't want to hold creatures back to make sure you can hit it the turn Betor enters the battlefield
By turn three you have three ink, which is the first real decision point: do you develop a bigger threat, quest with everything for tempo, or hold up a removal Action for the opponent's best play
Nevinyrral's Disk has an activated ability that sweeps lots of permanent types, but its possible to combine it with Darksteel Forge, Mycosynth Lattice, and Unwinding Clock to destroy your opponents artifacts, enchantments, and creatures every turn