REDU format ruling
Ultimate Tyranno
Nearest-era rulings (Tengu, Sept 2011) — no REDU-specific archive exists.
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.
Rulings
- If you have 2 or more "Ultimate Tyranno" in Attack Position at the start of your Battle Phase, you choose 1 and it attacks all of your opponent’s monsters first.
- Either player may activate effects during the Battle Phase before Ultimate Tyranno attacks, as well as during, or in between its attacks.
- If Ultimate Tyranno attacks and destroys an opponent's Mystic Tomato and they use its effect to Special Summon another monster, then Ultimate Tyranno must also attack the newly Summoned monster.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the REDU forum — sourced change requests get reviewed.