Advanced format ruling
Sword Master
Card effect (current official text)If a Warrior-Type monster you control attacks your opponent's monster, and the opponent's monster is not destroyed by battle, at the end of the Damage Step you can Special Summon this card from your hand. During battle between this attacking card and a Defense Position monster whose DEF is lower than the ATK of this card, inflict the difference as Battle Damage to your opponent.
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.