Feedback Bolt 
Instant
Feedback Bolt deals damage to target player or planeswalker equal to the number of artifacts you control.
Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL
Instant
Feedback Bolt deals damage to target player or planeswalker equal to the number of artifacts you control.