Karakuri Watchdog mdl 313 "Saizan" (STOR-EN027) - Storm of Ragnarok Unlimited

This card must attack if able. When this face-up card on the field is selected as an attack target, change its Battle Position. When you take Battle Damage from a battle involving this card, all face-up "Karakuri" monsters you control gain 800 ATK and DEF until the End Phase. While this card is in face-up Attack Position, it cannot be destroyed by battle.