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A dedicated endgame variant of Hell's Stronghold stage only, unlocked separately from the regular Hell stage list at the Monster Park NPC. Requires total level 10,000+. Solo only.
| Mode | Tier | Entry Cost |
|---|---|---|
| Solo | 210 | 1,000x Golden Meso Bag |
Reward: today's themed box (see the Weekday Reward Rotation) at 10x instead of the usual 1x, plus 500x Monster Park E Ticket (every other Monster Park difficulty/stage grants 175x), plus 1x Burning Hell Coin - exclusive to this Challenge - plus 1 Donation Point for finishing the run.
Daily limit: a separate pool from the regular Hell stages - 10 attempts/day, no purchased attempts or weekly bonus bank.
Talk to the Monster Park NPC and pick "Exchange Burning Hell Coins". You'll need your Spiegelmann's Gold Badge equipped (the same badge purchasable from this NPC for 250,000x Monster Park E Ticket) - the exchange upgrades every main stat that badge has to a guaranteed total:
| Guaranteed Stat Total | Cost |
|---|---|
| 6,500,000 | 10x Burning Hell Coin |
| 9,999,999 | 25x Burning Hell Coin |
| 15,000,000 | 100x Burning Hell Coin |
| 20,000,000 | 250x Burning Hell Coin |
| 25,000,000 | 500x Burning Hell Coin |
Once every main stat is at 25,000,000, a further "Upgrade my 25,000,000 Badge" scroll unlocks: 5x Burning Hell Coin per attempt, a 70% success chance, +20,000 to every main stat on success (nothing lost on failure), up to 250 attempts total.