Advanced format ruling
Everliving Underworld Cannon
Card effect (current official text)Once per turn, when a Zombie-Type monster is Special Summoned to your side of the field: 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.