Rootwater Thief

Targeted library extraction was the design joke here: instead of milling or wheeling, this Merfolk reaches into an opponent's deck and steals the one card you most want them never to draw. The combat-damage trigger turns evasion into a search engine, and the self-funded flying ability solves its own delivery problem, asking only blue mana to slip past a stalled board. What made it a real answer rather than a curiosity was the precision: pay on a hit and you remove a specific card, not a random one, so a single connection could pluck the lone board wipe out of a control deck or the combo piece out of a kill shell before it was ever drawn. That precision came with a tax. The body is fragile and the search costs mana every turn it lands, so the card rewards patience and a clear read on what the opponent is leaning on; whiffing on a useless target is wasted tempo. It is disruption aimed not at the hand or the battlefield but at the library, the resource an opponent has the least information about and the least ability to protect. The flavor and the function line up cleanly: a rogue that does not kill you so much as quietly rob your future.