mtg murders at karlov manor commander precons Decks [Set of 4] Murders at Karlov Manor Commander

You can transform it with 1 mana if you've cast three of your spells - easily done with your extra mana

When this Aura is put into a graveyard, each opponent loses 1 life.) You can cast Witch's Mark without a target just to discard a card and draw two cards

This card is from the set Arabian Nights

Based on what Rasmussen said during the stream, it seems Power-Up will be one of the core mechanics of Marvel Super Heroes

Power Artifact (Combo) Power Artifact + Grim Monolith = Infinite mana

And unlike Blood Artist and such, these triggers can be directed at a number of places, such as planeswalkers, creatures, or at someone's face