Advanced format ruling
Strike Ninja
Card effect (current official text)(Quick Effect): You can banish 2 DARK monsters from your GY; banish this face-up card until the End Phase. You can only use this effect of "Strike Ninja" once per turn.
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.