Why this is even something that can be successfully traded today is because of the emotional value

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Speaking of free, probably the craziest thing you can do with Unpredictable Cyclone is to get it on the battlefield alongside something like New Perspectives or Fluctuator, which let you cycle cards for free
Outcome proposed: Yes No dispute Final outcome: Yes Beware of external links
Summoning sickness is a huge downside, especially since Vannifar has no means of protecting itself, but haste or a bit of luck turns this into a value or combo engine, depending on how you built your deck