Whenever Neerdiv becomes tapped, target player mills cards equal to its power.
Whenever you cast a spell from your graveyard or activate an ability of a card in your graveyard, draw a card and put a +1/+1 counter on Neerdiv.
Neerdiv is a mono-blue self-mill engine: tap it (combat, untap loops, or tap effects) to fill graveyards equal to its power, then cast spells from your graveyard with flashback, jump-start, or escape to draw cards and snowball +1/+1 counters. You grind value, grow Neerdiv into a real threat, and out-card your opponents before closing with a big unblockable swing or a mill/draw payoff.
Built-in card advantage engine that rewards graveyard casting
Grows itself larger, increasing both mill output and combat damage
Mono-blue gives access to deep counterspell, draw, and tempo packages
Doubles as a mill wincon against opponents while self-milling for value
Mono-blue's premier blowout to protect your engine and push your finish.
Add reliable tap/untap enablers (Thassa, Deep-Dwelling; Intruder Alarm; Kydele-style untappers) and evasion so Neerdiv mills and connects every turn. Lean harder into recursion payoffs—escape and flashback spells, Mystic Sanctuary loops, and Underworld Breach—to chain graveyard casts, and lock in a deterministic finish with Jace, Wielder of Mysteries plus a self-mill outlet like Tasha's Hideous Laughter.
Legendary Creature — Merfolk Rogue
