Advanced format ruling
Cloudian - Poison Cloud
Card effect (current official text)When this card is destroyed by battle and sent to the Graveyard, if it was face-up at the start of the Damage Step: Destroy the monster that destroyed it, and if you do, inflict 800 damage to your opponent.
Current rulings for this card are maintained by Konami.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Advanced forum — sourced change requests get reviewed.