TCG Rulings
- Tributing 1 Synchro Monster you control is a cost.[1]
OCG Rulings
- Tributing one Synchro Monster is a cost to activate "Synchro Barrier".[2]
References
- ↑ Konami Gameplay FAQ: Stardust Overdrive Sneak Peek -- Card Rulings (Version 1.0)
- ↑ Konami FAQ: Trap Card > Synchro Barrier