Edison format ruling
Brain Control

Card text as printed in this era① Pay 800 LP, then target 1 face-up monster your opponent controls;
take control of that target (until the End Phase).
Rulings
- If that target isn't face-up in your opponent's control when this resolves, control of it does not change.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Edison forum — sourced change requests get reviewed.