Prometeor, the Burning Star — Ruling

Effetto 0

• This card's effect is a Trigger Effect. (It does not target.)
• This effect can be activated at the end of the Damage Step when this attacking card destroys a monster in your opponent's Main Monster Zone by battle.
• Discarding a card is the cost to activate this effect.
• Even if Prometeor, the Burning Star leaves the field after applying its effect, the zone that it made unusable still cannot be used until the end of the next turn.