Klau, the Reckless Shooter

{t}: Klau, Reckless Marksman deals 2 damage
to any target. When you use this ability, draw
a card, then discard a card. If you discard an artifact card this way, Klau D. Box'exa deals 4 damage instead.

During your turn, you may cast artifacts from your graveyard, paying 2 life in addition to the other costs.