For this list in particular the Jar is very poor as in order to use it right away you have to have spent five mana
Then, sacrificing a Food will create a 1/1 rat creature token, which will trigger Peregrin Took and generate an additional Food Token, creating a self-sustaining combo
This commander is built around casting big powerful creatures instead of simply winning with yet another Thassas Oracle combo, injecting some fresh cards into competitive Commander play
But getting a creature directly into play while triggering cards like Fecundity and Blood Artist sounds pretty decent, and three tokens is a lot of sacrifice fodder, so I see it having a place in the right casual brew
(You may cast a card from your graveyard for its mayhem cost if you discarded it this turn
Errant and Giada Three mana is a low investment for a commander, and the ability to cast spells from the top of your library is a huge one, giving you lots of card advantage