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They're one of the original 'tribal' creature types: fish folk has been a viable strategy since the very earliest days of Magic: The Gathering

Absorption issues

During the Main Phase (Quick Effect): You can Tribute 1 monster

The other place where Unpredictable Cyclone works well is with other cycling payoffs

A Jeskai Control deck with Think Twice and Serum Visions can probably get away with playing slightly fewer lands than a R/W Control deck with no card advantage or filtering (which is why the R/W Control decks plays four copies of Simian Spirit Guide)

In the Loaner Deck that you are given for the Duels that they are available, these four cards should be the focus of your attention to bring to the Field