Millikin is a uncommon Artifact Creature — Construct card from Modern Horizons 2 (MH2), collector number 297. Current market price: $0.24 (foil $0.38), TCGplayer market prices via Scryfall.
{T}, Mill a card: Add {C}. (Activate only as an instant. To mill a card, put the top card of your library into your graveyard.)