The folk song “The Bells of Aberdovey” references an instance of this fate which happened because the guard Seithennin (“SAYTH-uh-nin”) got too drunk at a palace. Soldiers of Batu Khan witnessed another instance of this occurrence after following a secret path to Svetloyar (“SVET-lah-yar”). The legends of Cantre’r Gwaelod (“kon-TRAIR GWEH-loth”) and Kitezh (“kee-TEZH”) feature examples of this fate, another instance of which eliminated the main supply of orichalcum (“or-ee-KAL-kum”). When a silver key taken (10[1])from the neck of princess Dahut (“DA-hoot”) is used to open a city’s gates, this fate befalls (10[1])the realm (10[1])of King Gradlon (10[1])in the Breton legend of Ys (“ess”). The gods inflict this fate on a well-ordered society that tried to invade Athens in a passage from the dialogue Critias used as an allegory of hubris. For 10 points, what occurrence hid Atlantis from the world? ■END■ (10[2])