Neerdiv, Devious Diver is a rare Legendary Creature — Merfolk Rogue card from Foundations Jumpstart (J25), collector number 36. Current market price: $1.51, TCGplayer market prices via Scryfall.
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.