This point completely supersedes whether the MTG card is actually playable, meaning that MTGs market, to some extent, is a vintage collectibles one
That's a very good advantage, and the fact that it's so cheap to play means you can do a massive amount of setup early in the game, or just a play a big monster and have it get over its summoning sickness before the opponent can do anything whatsoever
For those who dont play a lot of big creatures in order to optimize efficiency, as is common with cEDH decks, Culling the Weak is going to be better suited to your needs
Its also worth noting that in Hazduhrs surprisingly comprehensive lore, its stated above almost everything else that hes old, ill, and will probably be dead in a couple years
For the most part this list is based mostly on the frequency of play the cards receive
And if you want to go big, Shared Animosity turns your massive snake token army into a lethal force, while Beastmaster Ascension ensures they hit hard to potentially win you the game