Advanced format ruling
Ultimate Tyranno
Card effect (current official text)This card can attack all monsters your opponent controls, once each. During your Battle Phase, if you control an "Ultimate Tyranno" that can attack, monsters other than "Ultimate Tyranno" cannot attack.
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.