The boss has 40 HP. Your followers keep getting cleared. Every plan that begins with “next turn, this card attacks again” ends with an empty board.
And then Satan Runecraft asks an extremely rude question: What if we didn't have to deal 40 damage at all?
The real problem wasn't the number 40
In Battle Dungeon Explore, a Storm Dragon deck seemed like a reasonable answer. Hit the boss quickly, keep some followers around, and finish with another burst.
Except the boss kept sweeping them away. Damage you expected from the board next turn never arrived. The plan wasn't necessarily bad against every opponent; it was a poor answer to this particular one.
At that point, squeezing a few extra points from the same strategy wasn't the exciting option. Changing the win condition was.
Satan doesn't hit harder. He changes the question
Satan, The Ultimate Sin, replaces your deck with the Apocalypse Deck. One of the cards it provides, Astaroth's Reckoning (《アスタロトの宣告》), sets the opposing leader's maximum defense to 1.
Meanwhile, Elmot (《懐旧の送り火・エルモート》) can gain a Crest through Super-Evolution that deals 1 damage to the opposing leader at the start of your turn.
Dragon: “How do I deal 40?”
Satan: “Could we make the maximum 1 instead?”
Elmot: “New turn. One damage.”
Boss: “That wasn't in the spirit of the exam.”
That's the joke: instead of climbing the mountain, you ask whether the mountain can be made one centimeter tall.
It is still a combo, not a free win. You must reach Satan, find and play the required card, set up Elmot's Crest, and survive until its start-of-turn damage matters. The boss gets plenty of chances to ruin that plan, too.
In Explore, a loss can be useful information
Explore adds run-specific Blessings and bosses built around unusual advantages. A deck that feels strong in a normal match can be completely wrong for one of those fights.
After losing, ask what actually happened. Did you draw badly? Or did the boss reliably erase the exact board you needed to win? Bad luck suggests trying again. A repeated mismatch suggests changing decks.
That's the joy of the mode: it rewards finding a different answer, not simply playing the same answer more aggressively.
The best moment happens before the victory screen
Forty HP sounded impossible when the goal was to deal forty damage. The moment the goal became “make the maximum one,” the puzzle looked different.
The most satisfying part of Battle Dungeon Explore isn't always the final hit. Sometimes it's the instant you realize the boss has an unfair rule—and you have brought an even sillier one.
Card effects are based on documented 2026 versions. Event rules, bosses, and available Blessings may change between runs.
Sources: Astaroth card effect · Elmot card effect · Official battle basics
