Ox of Agonas Ox of Agonas is a repeatable draw three for (assuming you keep finding ways for it to die)
Throw in Sadistic Glee, a fellow Common from Tempest that puts a +1/+1 counter on the creature it enchants whenever another creature dies, and you have yourself an infinite loop
These creatures can be broken down into three types: self-mill, utility, and recursion
This may find its way into Zombie decks that flood the board very naturally - Wilhelt, the RotcleaverWilhelt, the Rotcleaver, to be specific - but in my opinion, Zombie strategies are another extremely well-established archetype, so it's hard to make room for cards like this, even when they look really cool
Magic: The Gathering has been running for literal decades, and while reprints will always keep making harder-to-find cards a little easier to collect, there are some cards so rare that they become almost like urban legend
That also means that it can deal Commander Damage to you