Sea Spirit

The blue firebreather, and the reason that template is interesting in blue at all. Firebreathing has always been red's signature: pump power with mana, swing for a number nobody can quite block profitably. Putting the same ability on a 2/3 in the color with the fewest reasons to attack is the design tension here. Blue's creatures are usually accountants, not finishers, so a body that converts surplus mana into a closing clock asks the deck to do something blue rarely does. The 2/3 base matters too: three toughness keeps it alive through the small removal common when it was printed, and the activation only touches power, so the creature stays the same defensively while becoming a real threat once the mana is free. It is mana-sink design before that phrase was common vocabulary, the kind of card a control shell could leave on the table as a slow inevitability while it sat behind counters. The rate is unhurried by modern standards, but a permanent that turns untapped lands into damage at instant speed is the same idea that makes mana sinks valuable in any era. It reads as a curiosity in blue precisely because blue spent most of its history not wanting a creature like this.