You need four players to play this or it wont work. Yo start off woth a king use him to create your hero. After eveyone has selected their hero you can move them through the gate ahead. Every 10 kills you get another king to upgrade you hero/men (you only get 3 upgrades if you get enough kills). Everyones hero needs to survive until the end.
I havent accually tried it yet(cant get 4 people:( )So There might be some mistakes but hey its only my second time at aking a minigame.