Of the two, Jasper gets the standout emerald card, standing head and shoulders - literally - above his criminal companion
Naturally, this also makes Miirym into another commander that can win the game using a Worldgorger Dragon
If however the spell you manage to place back on top is one that is only useful because of the stage of the game such as a ramp spell then you have gained a huge advantage, greater that you would have gotten from putting that card in the graveyard
From among the extended-art Commander legends, there are 57 rares and 8 mythic rares
Cheer Whenever one or more creatures you control with counters on them deal combat damage to a player, you may draw a card and proliferate
And as a 2/4 for 3 that can quest for 3 lore when your opponent's hand is empty, she is pretty strong