Squeaknight (IGAS-EN031) - Ignition Assault Unlimited

If this card is Special Summoned: You can activate this effect; treat this card as a Tuner this turn, also you can only Special Summon once from the Extra Deck for the rest of this turn. Once per turn, you can either: Target 1 face-up monster you control; equip this card to that target, OR: Unequip this card and Special Summon it. If the equipped monster would be destroyed by battle or card effect, destroy this card instead.