Advanced format ruling
Mazera DeVille
Card effect (current official text)This card cannot be Normal Summoned or Set. This card cannot be Special Summoned except by Tributing 1 face-up "Warrior of Zera" on your side of the field while "Pandemonium" is on the field. If "Pandemonium" is on your side of the field when you Special Summon this card, your opponent discards 3 random cards from their hand. If "Pandemonium" is not on your side of the field, this effect is not applied.
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.