REDU format ruling
Synchro Control

Nearest-era rulings (Tengu, Sept 2011) — no REDU-specific archive exists.
Card effect (current official text)Activate only if you have no Synchro Monsters on your side of the field or in your Graveyard. Pay 1000 Life Points and select 1 face-up Synchro Monster your opponent controls. Take control of the selected monster until the End Phase of your turn.
Rulings
- Paying 1000 Life Points is a cost.
- This targets your opponent’s Synchro Monster.
- If you take control of a Synchro Monster and then flip it face-down, you will keep it until your End Phase and then return control of it as normal.
- If the monster targeted by "Synchro Control" is flipped face-down before the effect resolves you do not gain control of it.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the REDU forum — sourced change requests get reviewed.