Ive heard some call it the green Shelly (Sheoldred, the Apocalypse) for formats like Standard and Modern and its not a perfect analog since Ouroboroid cant just solo people like Shelly can, and is worse against bolts but it does highlight something: letting this live for a turn or two can make life rough, even on its own
Boones not a big fan of Caesar and I cant imagine he would want Caesar as his commander
Razaketh is an evasive threat with both flying and trample, but its power lies in its activated ability that allows you to pay two life and sacrifice a creature to tutor for any card in your deck at instant speed
Then you drop the hammer and go extra super mega slug
Grimgrin, Corpse-Born sees competitive metagame play in 1 format(s): Commander
(Im looking straight at you, $15 Thing in the Ice!) Sorin, Grim Nemesis I like that he lets you draw and punish all at the same time