It's cheap and splashable so it can easily slot into any Blue deck, but being an enchantment makes it particularly juicy in Enchantress decks like Zur the Enchanter and Tuvasa the Sunlit, and in Blind Seer decks which run cards like Glamerdye so you can change Insight to trigger off whatever the most popular color is that your opponents are running
Clement, the Worrywort Clement, the Worryworts return to hand ability goes on the stack, and then you can tap frogs before bouncing them if theyve been out a turn
Multi-type cards are a major boon here, when applicable
For starters, restrictions on tutors are no longer present in any bracket
Tempo decks are sort of like aggro decks with a big control element
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