Advanced format ruling
Reptilianne Hydra
Card effect (current official text)1 "Reptilianne" Tuner + 1 or more non-Tuner monsters
When this card is Synchro Summoned, destroy all face-up monsters with 0 ATK that your opponent controls, and draw 1 card for each monster destroyed.
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.