Toretoise

Toretoises are large neutral Tortoises that spawn underground, in the fashion of monsters. When hit while ore-less, or without a pickaxe, the Toretoise creates a single shockwave attack that deals damage to mobs around it. Additionally, it causes hostile mobs in the area to automatically target you.

Ores and Player Use
Every Toretoise has a signature feature: their ore. Tortoises spawn with a random ore, being Coal, Iron, Lapis, or Redstone. When hit with a pickaxe, the Toretoise will drop its ore and become ore-less. In this state, it can be fed Cave Root to regenerate a random ore. This can effectively make them ore generators, given you have the Cave Roots to regenerate their ores. With a Feeding Trough, this feeding process can be made automatic. Toretoises cannot be dragged with a lead, but can with a Chain Line or Minecarts. After generating an ore, the Toretoise enters a cooldown where it cannot be fed for a short period of time. They cannot be bred.