At face value, it seems like a good Limited card, which it is
That's what happens when you combine Tinker (which could get out the Jar almost immediately) with Megrim (so that your opponent would take 14 damage from a single Jar discard, assuming they could not play any cards in time)
As with creature only one mana bounce, I think two mana non land bounce only really has one slot open to it in a cube and so despite this being a very rounded and nice card I fear we have seen the last of it
This is one of the best and most extreme implementations of sneak, but it takes the card from being a possible inclusion to a must-have for milling decks, and maybe even at three or four copies, too (in Standard)
Since infect puts -1/-1 counters on creatures it deals damage to, this allows Yawgmoth to act as removal so long as you have a sacrifice outlet