discard mtg cards Cube: Top 10 Effects Draw two cards Top 10 Opponent-Discard Cards in
Description
I also like Broken Fall and Molting Skin, since you can cast one of them early before casting Grothama and not have to pay any mana to regenerate it

Fill that hand, then create some more little fun guys

Its so evil, I love it

Either way, you get an attack trigger, not a combat damage trigger, so even if you lose Locke its not the end of the world if you were just digging for some treasure

The amount of life you lose is determined by the mana value of the card in your graveyard, not the creature once it's on the battlefield