Not only do you need to be consistently sacrificing artifacts or enchantments, but you also have to care about the life gain portion of the card to run it in the first place
The Endless Punishment Commander preconstructed deck contains top-end cards like Braids, Arisen Nightmare, Kederekt Parasite, Massacre Girl, Mayhem Devil, and Vial Smasher the Fierce
Aether Chaser has First Strike and "When Aether Chaser enters the battlefield, you get two energy counters"
The good news is, Black-Green has a critical mass of Collect Evidence cards which will trigger Insidious Roots, but this still kind of asks a lot of you
"creature" spells summon creatures that can attack and damage an opponent as well as used to defend from the opponent's creature attacks