Where Rancor triggered to return whenever it hit the graveyard, Infectious Bloodlust only triggers when the creature dies, which makes it a lot less likely to replace itself
Gonti, Lord of Luxury gets you a choice from the top four cards of an opponents library when it enters the battlefield
Ruby ink cards generally encourage a lot of challenging opponents and taking a forceful approach , giving the player plenty of options to throw the opponent off their stride
It becomes a creature again if it's not attached.) This creature and enchanted creature each get +X/+X, where X is the number of creature cards in all graveyards
If you're running Rampant Growths and mana rocks, then you've got nothing to fear
So if you have ways to sacrifice creatures for value something that Grixis (blue/black/red) has plenty of ways to do you can get even more value out of them