Brass's Tunnel-Grinder // Tecutlan, the Searing Rift (The Lost Caverns of Ixalan 373) - Rare Magic: The Gathering Card

When Brass's Tunnel-Grinder enters, discard any number of cards, then draw that many cards plus one.
At the beginning of your end step, if you descended this turn, put a bore counter on Brass's Tunnel-Grinder. Then if there are three or more bore counters on it, remove those counters and transform it. (You descended if a permanent card was put into your graveyard from anywhere.)