The system was originally made as a joke by lead game designer Mark Rosewater but has since become a legitimate way of ranking mechanics from evergreen to never again. Things like artifact creatures or flying are ranked at level 1, which indicates theyre evergreen mechanics
He also has a Blood Artist effect: whenever another creature dies, you gain one life and target opponent loses one life
Amonkhet Raceway seems slightly better than the other two, as haste on demand late game is a powerful bonus
I want to be clear, this is not me saying that will ever happen, but that was the one among the panel with the most traction
MTGNexus, MTG.Design, and Magic Set Editor are all highly rated by users for their features such as user-friendly interfaces, customizable options, card organization capabilities, image rendering of the created cards, and exportation of entire sets for gameplay
Given that were in Dimir, well add one more copy card thats also excellent graveyard control: Dimir Doppleganger