Tengu format ruling
Moisture Creature
Card effect (current official text)If you Tribute Summon this monster by Tributing 3 monsters on the field, destroy all Spell and Trap Cards on your opponent's side of the field.
Rulings
- You can Summon Moisture Creature by Tributing 2 monsters, but the effect will not be activated.
- You cannot Summon Moisture Creature by Tributing 3 monsters if there are no Spell or Trap Cards on your opponent’s side of the field.
- If you activate the effect of Moisture Creature and your opponent chains Book of Moon to the effect, the effect still resolves and all Spell and Trap Cards on your opponent’s side of the field are destroyed.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.