REDU format ruling
Penguin Soldier

Nearest-era rulings (Tengu, Sept 2011) — no REDU-specific archive exists.
Card effect (current official text)FLIP: You can target up to 2 monsters on the field; return those targets to the hand.
Rulings
- You may choose to return 0, 1, or 2 monsters to their owners’ hands.
- You may target Monster Tokens, and they will be taken off the field, instead of returning to the hand.
- Spirit Monsters can still be returned to their owners’ hands by the effect of Penguin Soldier even if Spiritual Energy Settle Machine is in play.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the REDU forum — sourced change requests get reviewed.