Another notable feature of Bloodthirsty Conqueror is that its a Vampire, and Vampires have long been a popular strategy to play in Commander, especially with the renewed interest of Edgar Markov with the release of Innistrad Remastered early next year
On the third turn, you could play 6 Elves, but instead you are probably attacking with some
This one costs five mana instead of four and doesn't include a way to cast it for free, but if you're looking for a type manipulator in Black, this is one of your best options
The counter doublers you looked at before will be fantastic here
-Lennon-McCartney, recorded by The Beatles Hey, just be happy I chose this over Gnomeo & Juliet references
Champion of Lambholt: A strong creature if you can play a lot of creatures after you cast this