Advanced format ruling
Silent Strider
Card effect (current official text)You can send this card from your hand to the Graveyard to reduce the Level of 1 monster on the field by 1, until the End Phase.
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.