The Munchdew attracts passive mobs within a static range when fed mana. It will nom away at them, stunning them and sticking them to their place.

EDIT (V): Leaves 2 mobs of the same kind behind for breeding.
REPLY: I think that would make it a bit too easy. I think more planning should be required for that kind of sustainability.

Mobs killed this way have a chance not to drop anything, to balance the practically free farming out (the Munchdew may have been a bit too hungry).

Recipe:

• Lime Mana Petal
• Red Mana Petal
• Green Petal x2
• Rune of Gluttony
• Rune of Earth

I have some other plans for this sometime.