Edison format ruling
Jester Lord
Card effect (current official text)While this card is the only monster on the field, it gains 1000 ATK for each card in the Spell & Trap Card Zones.
Rulings
- If you activate "Shrink" targeting "Jester Lord," its original ATK of 0 will be halved then its Continuous Effect will be reapplied. (The end result is no change in ATK.)
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Edison forum — sourced change requests get reviewed.