A solo monster-hunt challenge (Event Center > Hecate's Moon). Each challenge costs one Underworld Key; you get 2 keys/day free by reaching 80 or 110 daily Activity score (or buy a $9.99 package). One round: monsters spawn within ~30km one at a time (solo only, no rallying), each staying 5 minutes; defeating them earns event points and Radiant Night Torch tokens. A fixed total of 19 monsters/Hecates appear before the final boss. Visiting Hecate's true form (up to 3 times: Black Moon = boss difficulty/troop count, New Moon = boss troop type, Underworld Moon = boss buff strength) configures the final Trial Temple boss. Scoring: (1) defeat the strongest Trial Temple you can, (2) kill high-point monsters, (3) visit all 3 Hecates (2 and 3 are luck; you control 1). Point list: regular monsters 20, tougher (Kamaitachi/Behemoth/Jormungandr/Typhon/Swift Goblin) 40, each Hecate 40, Trial Temple 280-390. High-score tips: choose hardest difficulty + highest buff; with strong ground/mounted pick a SIEGE-type temple (never attack with ranged -- weak to siege). Torches redeem at the New Moon Shop and DISAPPEAR after the event -- spend promptly. General Hecate (just owned) adds a bonus torch. Ranking is by highest single-round total. Free daily play. For a bot, this is a monster-hunt event: play the 2 free keys daily, pick the hardest survivable temple, and spend torches before the event ends.
Original research source: Evony Guide Wiki