Blue's strengths are drawing cards, taking control of opponents' cards, countering (negating opponents' spells), and flying creatures or creatures that cannot be blocked
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Sea Scryer Maybe I just remember playing this too often back in the day, but blue ramp cards that can also get blue mana that can be used for anything are worth it in blue decks that want to do various things
Whenever I have brewed Explore decks, I encounter a common pattern of being excited for them and then having them perform well below expectations
It's done in fantastic detail, too - The eyes, the teeth, the tiny fragments of glass, everything