Katrina, Storm Mage

Flying, First Strike, Haste
{1}, Remove a +1/+1 counter from this creature: Katrina, Storm Mage deals 3 damage to any target.
Sacrifice an Artifact: Put a number of +1/+1
counters on Katrina, Storm Mage equal to the sacrificed artifact's converted mana cost.
You may cast artifact cards from your graveyard.