Tengu format ruling
Dragon Ice
Card effect (current official text)When your opponent Special Summons a monster (except during the Damage Step): You can discard 1 card; Special Summon this card from your hand or Graveyard. There can only be 1 "Dragon Ice" on the field.
Rulings
(1) When your opponent Special Summons a monster, you can discard 1 card to Special Summon this card from your hand or GY. (2) There can only be 1 face-up Dragon Ice monster on the field.
- The (1) optional Trigger Effect CANNOT be activated in the Damage Step [REF].
- This is similar to Green Baboon, Defender of the Forest's, whose rulings were updated [REF].
- This effect does not target.
- Discarding 1 card is a cost. Dragon Ice itself can be discarded as cost, and then Special Summon from your GY.
- The (2) Unclassified effect applies while Dragon Ice is face-up. This effect cannot be negated.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.