They are each level-four Water Fiend-type monsters, but this is where their similarities end: their effects, although sometimes overlapping, are unique
With the collector in mind, this display frame fits most traditional sized 4 x 3 baseball, sports, trading and other cards in top loaders so you can display and protect your cards from scratches
Jesters Cap and Mask was pure control, not just for Blue but, for any color deck
Treasure tokens can especially help you cast cards with improvise, waterbending, or affinity for artifacts like Battle at the Bridge, Spirit Water Revival, or with Tezzeret, Master of the Bridge
Mass Hysteria
You can expect it to appear in every set on at least a few creatures