Advanced format ruling
Vennominon the King of Poisonous Snakes
Card effect (current official text)Cannot be Special Summoned by another Effect Monster's effect. This card is unaffected by "Venom Swamp". This card gains 500 ATK for each Reptile-Type monster in your Graveyard. When this card is destroyed by battle and sent to the Graveyard: You can banish 1 other Reptile-Type monster from your Graveyard; Special Summon this card.
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.