
Choose target creature. You get {E}{E}{E} (three energy counters), then you may pay any amount of {E}. Harnessed Lightning deals that much damage to that creature.
Harnessed Lightning has 2 printings, first in Kaladesh (2016). EDHREC ranks it #16,081 among Commander cards. It appears most in Saheeli, Radiant Creator decks (935 on EDHREC). It has 11 official rulings.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.