Blue is not spoilt for choice on really above the curve monsters and so this sees play in decks where it doesn't have any specific role or synergy
Kokiri Forest is the first location in the story, and this is where Link is sheltered from the dangers of the outside world
Vicious Rumors This one-cost mana common makes all foes ping one, mill one, discard one and then you gain life too
Voyager staff was a piece of tech that I think Alfonso suggested, and it is great in my lower powered environment
Freeing up your first mana on turn one can be an additional enabler, a bonafide Ninja, or holding up crucial interaction, thats obvious
Some day well have a more definitive answer here (or if I had a month to go set by set and calculate with the unique number of foils and that particular set of languages), but until then, I think we should estimate higher