Final Fantasy - Tiered Winner: Restoration MagicRestoration Magic Runner-up: Fire MagicFire Magic On the completely opposite side of the spectrum, tiered is a mechanic that leaves something to be desired
Like, why do they do that
Other creatures are Food artifacts in addition to their other types and can be used as Food Tokens (spend 2 generic, tap them, sacrifice them, and gain 3 life)
Then you take control of combat on key turns in which the table would rally against your goad commander with a sacrifice outlet and pop off a Not Dead After All type of card to bring Kardur's ability up again
Combined with the low average cost of cEDHs best playables, Ad Nauseam might as well read Pay five mana, draw 20 cards. This is obviously one of the best things you could do in the entire format, especially alongside the other cards on this list (Demonic Tutor to find your last missing piece, anybody?)