Collective Charge

As an additional cost to cast Collective Charge, sacrifice an artifact.
Escalate - Tap an untapped Planeswalker you control or pay {2}. (Pay this cost for each mode chosen beyond the first.)
Choose one or more:
- Destroy all artifacts you don't control.
- Collective Charge deals 6 damage to target creature or Planeswalker.
- Collective Charge deals 3 damage to each creature.