Spirit Flare

Oracle Text

Tap target untapped creature you control. If you do, it deals damage equal to its power to target attacking or blocking creature an opponent controls.

Flashback—1W, Pay 3 life. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Card Rulings

10/4/2004 If either target is illegal when the spell resolves, it will do no damage.