With how many combo enablers there are in the deck for infinite sacrifice, Blood Artist is a way to turn that into proper damage to win off the combo
Once you stick Wrenn and Six, say on turn 2, you can cast Crop Rotation for G and then again for 2G to get Dark Depths and Thespians Stage
Surtr, Fiery Jtun slings around damage when you cast historic spells, which gives it a few unique builds
Frodos heart flamed within him
This goes best with creatures like Cruel Somnophage, Wight of Precinct Six, and Mortivore
Attacking with a creature like this is always going to feel good, as your opponent can basically never just take 6 from it and survive, since youre going to add something else to the board pretty much every time