Rhystic Lightning deals 4 damage to any target unless that permanent's controller or that player pays . If they do, Rhystic Lightning deals 2 damage to the permanent or player.
Legalities
Not Legal
Standardbrawl
Brawl
Penny
Future
Modern
Alchemy
Pioneer
Historic
Standard
Gladiator
Oldschool
Historicbrawl
Explorer
Timeless
Legal
Duel
Legacy
Pauper
Vintage
Commander
Premodern
Paupercommander
Predh
Oathbreaker
Rulings
2004-10-04
The player gets the option to pay when this spell resolves.