Altar of the Wretched / Wretched Bonemass Altar of the Wretched is like a Blood Divination, allowing you to sacrifice a creature, draw some cards and mill
The clock is really fast, and a turn 4 Dragonlord Atarka is very much still a reality as it was in G/R Devotion even without Elvish Mystic and Nykthos, Shrine to Nyx
There is a bit of deck building tech if you put in a number of historic lands, likely Legendary lands to mitigate getting stuck on lands
Deepfathom Echo Deepfathom Echo is one of many clone variants with some upside
Your opponent will defend, you'll hopefully win (with a Lightning Strike tipping the scales), and then A-Raiyuu will trigger a second attack to crush your opponent's defenses
Today I am going to do my thoughts for the beloved top +1/+1 Counters Matters support for Commander, not Commanders themselves though, just support cards