In the early game, that might be a net-positive for your opponent, but in the late-game, it can feel devastating if it nukes something powerful
Bristly Bill is a hard creature for enemies to deal with, as getting him out early means they have to choose between killing Bill to stop the growth or killing whatever creature Bill has been putting his counters on
Although they are great Merfolk lords they are incosistent as finishers because we may play against decks with no blue color
At an MSRP of $59.99 USD, Deep Trouble has all the makings of a family game nightsimply grab two more decks, like the Starter Decks, and see if you can overcome the dastardly sea witchs plans
However, when I put it in my deck, I usually include it more for its utility
It's been a strong player in the Pioneer Scapeshift combo deck that loops copies of Lumra and Aftermath Analyst much like Amulet Titan does in Modern