REDU format ruling
Cloudian - Eye of the Typhoon

Nearest-era rulings (Tengu, Sept 2011) — no REDU-specific archive exists.
Card effect (current official text)This card cannot be destroyed by battle. If this card is in face-up Defense Position, destroy it. When this card declares an attack, change the battle positions of all face-up monsters, except "Cloudian" monsters.
Rulings
source: Rulings_Tengu (Format Library) — nearest era to REDU (Sept 2011 vs Sept 2012); verify against period sources · 1 era-inappropriate line(s) removedRulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the REDU forum — sourced change requests get reviewed.