A symmetric effect impacts both players the same way, so it's difficult to glean an advantage from one under ordinary circumstances
7 Edgar Markov The de facto Commander for Vampire tribal decks, Edgar Markov bears mentioning for his ability to end games of Commander on the spot thanks to the combination of first strike, haste, and adding counters to all Vampires you control
Phasing is better than giving hexproof instantly (Lazotep Plating, Heroic Intervention) or indestructible (Rootborn Defenses, also Heroic Intervention) - which are heavily played
Those creatures gain trample until end of turn
Creatures (26) 4 Bomat Courier 4 Scrapheap Scrounger 3 Midnight Reaper 4 Priest of Forgotten Gods 4 Mayhem Devil 4 Cauldron Familiar 3 Woe Strider Lands (24) Spells (10) The biggest question mark surrounding Rakdos Sacrifice is whether or not it can beat sideboard hate, typically Grafdiggers Cage or Yasharn, Implacable Earth
This Shadows over Innistrad offering is pretty much your bog-standard ooze