Tengu format ruling
Anti-Spell

Card effect (current official text)Remove 2 Spell Counters on your side of the field to negate the activation of a Spell Card and destroy it.
Rulings
Remove 2 Spell Counters on your side of the field to negate the activation of a Spell Card and destroy it.
- Removing 2 Spell Counters is a cost.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.