Edison format ruling
Shadowslayer
Card effect (current official text)If all monsters your opponent controls are in Defense Position, this card can attack your opponent directly.
Rulings
- For Shadowslayer (unlike cards like Black Tyranno and Drillago), only the Monster Card Zones are looked at. If all of your opponent’s monsters are in Defense Position, then Shadowslayer can attack directly even if your opponent has Spell and Trap Cards on the field.
- If Shadowslayer attacks a face-up Attack Position monster, and the opponent activates Book of Moon so that his only monster on the field is now in Defense Position, a replay occurs, because Shadowslayer is now able to attack directly.
- If all of your opponent’s monsters are in Defense Position but one of them is equipped with Ring of Magnetism, Shadowslayer cannot attack directly and must attack that monster if it attacks.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Edison forum — sourced change requests get reviewed.