Vicious dungeon, monster difficulty 150% on the main map, 120% in the Arena. No altars spawn in the first area unless prepared. The Arena has three shops with Kegs of Health and Mana, and Amulet of Yendor. You will find all altars in the Arena, each unlockable for 20 gold, except the Pactmaker. In the Arena, you will face nine bosses (Lord Gobb, Frank the Zombie, Tomithy Longdall, Super Meat Man, Jörmungadnr, Aequitas, The Iron Man, The Tormented One, and The Tower of Goo) in waves of three.