Bloodline PretenderBloodline Pretender (31,832 Inclusions, 1% of 2,606,027 Decks) There are only two Changelings that care about +1/+1 counters in Rakdos colors, and we'll be seeing both on the list today
If you have an abundance of land you can sac one to cycle Edge for a draw
What you need is a Displacer Kitten on the board to blink Vivi, allowing you to reuse his ability
Card advantage over your opponents offers more options and flexibility and can even win you the game
Canoptek Scarab Swarm Canoptek Scarab Swarm is very interesting as a way to hate on graveyards while also adding multiple flying artifacts to the board
It shuts down other effects as well - your opponents can't cast spells from anywhere other than their hands, so no casting spells using Madness, Plot, Mayhem, or a whole bunch of red impulse draw effects