Asceticism

"Asceticism" is a card from the "Scars of Mirrodin" set.  This card has the ability to make it so your creatures can't be the target of spells or abilities your opponents control, this is amazing on its own but the most amazing part about this is the card allows you to regenerate target creature.  So for 2 mana you can regenerate any creature you have on the battlefield as long as this enchantment is in play.  

Great for green decks and red/green decks.

Good:

-Regenerate TARGET creature

-Creatures you control can't be the targets of spells or abilities your opponents control.  

Bad:

-Costs 5 mana but for green and this cards ability that is very acceptable.

Scully Rating: 10 out of 10