Karakuri Watchdog mdl 313 "Saizan"

This card must attack if able. When this face-up card 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.

Machine EARTH Tuner Monster 4 effect