The Golden Gun

When this card enters the battlefield, choose one:
• Destroy target creature or planeswalker
• Destroy up to 3 target creatures with toughness
4 or less
• Destroy up to 6 target creatures with toughness
2 or less
For each target destroyed in this way, place a
0/1 colorless spirit token on the battlefield with
"{t}, sacrifice this card: add {1} to your mana pool"
then exile this card.