One-Hit Heroes - The Board & Barrel

About One-Hit Heroes, from BoardGameGeek:

One-Hit Heroes is a co-operative boss battle game where your team has only one HP! This card game is designed to keep the tense decisions of heavier co-op games while being more accessible to families with a lean setup, 20-minute battles and a 1-HP system that relies on clever aggro and card play to stay alive. Defeating more bosses unlocks new cards for your Armory, which introduces new synergies and increases variety for subsequent playthroughs. Each boss has a custom deck of moves to overcome your team, but each hero starts with a fully-unique deck filled with tools for outmaneuvering the boss with blocks, dodges and damaging moves. When you first open the box, your Armory will be empty. So you'll need to defeat bosses to unlock curated card packs filled with loot. These cards power up your Heroes and specialize them into roles on the team. Unlocked cards permanently upgrade your Armory to deepen your drafting options each game. But in order to defeat the final boss of each Episode, you'll need more than just a refined deck - you'll need to play your cards carefully and work as a team to survive long enough to win. Each turn has four phases: SCOUT, where you reveal the Boss's next move; FIGHT, where you play up to three cards; REST, where you redraw to five cards and clear your playing space; and SURVIVE, where you resolve the Boss Turn. When your life hangs by a thread, you want to defeat the boss before it has time to land a lucky hit - however, each damage you deal increases your Aggro, making you more vulnerable and making the boss even stronger. That means you can't simply DPS your way to victory - you'll also need to manage your Aggro and find ways to block with Items to avoid getting Hit. -description from the designer