A rare nobody plays can be bulk, while a common that sees play in Commander, Pauper, Legacy, or Modern can be worth more than a handful of rares
Elf Tribal Strategies The best Elf commanders in MTG reward you for filling your board with other Elves
The restriction to artifacts isnt too bad since many artifacts pick up counters worth proliferatingfor example, anything with modular, Astral Cornucopia, and Everflowing Chalice
Your colorless spells and artifacts have flash, better than Shimmer Myr, which only gives flash to artifacts, and cheaper
Though Sanguine Bond is the classic pairing with Exquisite Blood, Vito is better, both because it can be your commander and because its much cheaper
For us, every one point of damage matters