Judgment

Lightning Surge

Lightning Surge deals 4 damage to target creature or player.
Threshold Instead Lightning Surge deals 6 damage to that creature or player and the damage can't be prevented.
Flashback o5o
Ro
R (You may play this card from your graveyard for its flashback cost. Then remove it from the game.)

Lightning Surge deals 4 damage to any target.
Threshold — If seven or more cards are in your graveyard, instead Lightning Surge deals 6 damage to that permanent or player and the damage can't be prevented.
Flashback {5}{R}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)