Goat format ruling
Spell Economics
Card effect (current official text)You do not pay Life Points to activate Spell Cards.
Rulings
- While Spell Economics is applying, you don't have to pay LP to activate a Spell Card (place it face-up on the field), but to activate an effect of a Spell Card, like Archfiend's Oath, you still have to pay.
- Only the controller of Spell Economics gets its effect.
- You have to pay for Chain Energy even if you control Spell Economics.
- You pay the 500 LP to restore Horn of Light to your Deck even if Spell Economics is on the field.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Goat forum — sourced change requests get reviewed.