Today we released the Mob Farm to the Survival SMP server. And this being Minebattle, it isn't any regular mob farm of course! Everything is explained in this post.
The Magic Spawner will spawn mobs around it when players are nearby. If there are no players, there will be no mobs. It also scales on the amount of players around it, more players mean more mobs spawn.
Why grind in the mob farm at spawn? Because it pays off! All mobs inside of the mob farm have a chance to drop a new item: Dungeon Trinkets. Dungeon Trinkets are a one-use item that can be used to reset the cooldown of a dungeon. These items are tradable with other players so add a new aspect to the economy of the server as well. The drop chances of Dungeon Trinkets can be seen in the hologram inside of the mob farm...