Also known as: 世界樹の迷宮S, 世界樹の迷宮S_悠久の覇者
Short-lived mobile gacha spin-off of the Sekaiju No Meikyuu series. Its only new character was Bunny (Sekaiju S), who appears as a guide in the tavern.
Full title: Sekaiju no Meikyuu S: Yuukyu no Hasha
English title: Etrian Odyssey S: Eternal Conquerors