Its played in every format it's legal in, simply because its unrestricted disruption and cheap mana cost make it an essential control card for every blue deck
1 Traditional foil borderless or extended-art main set card, mana foil card, traditional foil Japan Showcase card, traditional foil Special Guests card, or fracture foil Japan Showcase The breakdown is below: This can be 1 of the 43 borderless rares (34.5%) or 17 mythic rares (6.8%, including 5 borderless planeswalkers)
It clearly is a pushed card given the easiness with which the Cascade decks can hit their little combo
Pair it with something that removes -1/-1 counters or adds +1/+1 counters when it comes into play and a free sacrifice outlet like Ashnod's Altar and this creature goes infinite in so many ways
Illustrated by Val Mayerik Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Not Legal Modern Not Legal Brawl Not Legal Legacy Legal Comp
[19] Ursula's Return [edit] Ursula's return with King Triton's trident grows to a giant and ensnares nearby characters