Advanced format ruling
Zombie Master
Card effect (current official text)Once per turn: You can send 1 monster from your hand to the GY, then target 1 Level 4 or lower Zombie monster in either GY; Special Summon that target. This monster must be face-up on the field to activate and to resolve this effect.
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.