REDU format ruling
Rallis the Star Bird

Nearest-era rulings (Tengu, Sept 2011) — no REDU-specific archive exists.
Card effect (current official text)This card gains ATK equal to the Level of the monster that it battles x 200 during the Damage Step only. If this card attacks, it is removed from play at the end of the Damage Step and returned to your side of the field in face-up Attack Position at the beginning of your next turn's Battle Phase.
Rulings
- "Rallis the Star Bird’s" effect that increases its ATK during the Damage Step is a Continuous Effect. It cannot be chained to. As soon as you enter the Damage Step the ATK is increased.
- "Rallis the Star Bird’s" effect that removes it from play is a Trigger Effect and can be chained to. Returning it to play cannot be chained to.
- If there is no vacant Monster Card Zone when "Rallis the Star Bird" would return to play it is destroyed.
- If your opponent takes control of "Rallis the Star Bird" and it is removed from play by its own effect it will return to play on their side of the field at the start of their next turn’s Battle Phase, but then it will immediately move back to your side of the field.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the REDU forum — sourced change requests get reviewed.