Flash
If an opponent would draw a card except the first one they draw in each of their draw steps, instead you create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")
If multiple replacement effects apply to the same card draw, the player drawing the card chooses the order in which to apply them.
If you control multiple Hullbreachers while an opponent would draw a card except their first one in their draw step, you'll create only one Treasure.