If this card is Summoned: You can Special Summon 1 "Iron Knight" from your Deck, also, if "Golden Castle of Stromberg" is not in the Field Zone, you cannot Special Summon monsters from the Extra Deck for the rest of this turn. You can only use this effect of "Iron Hans" once per turn. If "Golden Castle of Stromberg" is in the Field Zone, this card gains 1000 ATK for each "Iron Knight" you control.