Harvesting Field

Harvesting Field enters the battlefield tapped.
You may chose to not untap Harvesting Field during your untap step
Whenever you untap Harvesting Field, you lose 3 life. Exile 3 cards from your graveyard.
{t}, sacrifice a creature: add 3 mana in any combination of colours.
For some it might me an honor to be sent to a harvesting field, but I'll chose another way to die