Advanced format ruling
Shield Warrior
Card effect (current official text)During damage calculation, in either player's turn: You can banish this card from your Graveyard; monsters you control cannot be destroyed by this battle.
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.