Acid Slime M
The Medium Acid Slime is an Act 1 enemy with 28-32 HP. It can use Corrosive Spit (deals 7-11 damage and adds 2 Slimed cards to your discard pile), Tackle (10-14 damage), and when it reaches 50% HP, it Splits into two Small Acid Slimes, each inheriting roughly half the current HP.
The Split mechanic means killing a Medium Acid Slime efficiently matters — if you can burst it down in one hit below 50% HP, you avoid fighting two smaller slimes. The Slimed cards it adds are Unplayable status cards that clog your hand and discard pile. Prioritize ending the fight quickly to minimize Slimed card accumulation and avoid triggering the Split if possible.