REDU format ruling
Mezuki

Nearest-era rulings (Tengu, Sept 2011) — no REDU-specific archive exists.
Card effect (current official text)You can banish this card from your GY, then target 1 Zombie monster in your GY; Special Summon that target.
Rulings
- If that target isn't a Zombie when this effect resolves, it isn't summoned.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the REDU forum — sourced change requests get reviewed.