Defeat one Monster after you draw it (once per Dungeon). You choose the Monster to eliminate as soon as you see the current card, before knowing any of the following Monsters in the Dungeon.
Healing Potion
When you die, come back to life with your Adventurer's HP (once per Dungeon). After drawing a Monster card, if you have 0 or fewer HP, you can use the Healing Potion to set you HP as indicated on the Adventurer (4 for the Barbarian, 3 for the Rogue). This allows you to continue drawing Monsters.