Card Name: Metacarpus Node
Whenever you play a card with an effect that deals arcane damage, you may pay [1 Resource]. If you do, that effect deals that much arcane damage plus 1 and at the beginning of the end phrase, destroy Metacarpus Node.
Arcane Barrier 1 (If your hero would be dealt arcane damage, you may pay [1 Resource] instead. If you do, Prevent 1 arcane damage that source would deal.)