Steam Tamer, Arka

:Sentinel :[Choose a Zodiac Time Beast; from your hand, and discard it] When this unit is placed on , you may pay the cost. If you do, choose one of your units that is being attacked, and it cannot be hit until end of that battle. (Drop zone):[Choose another "Steam Tamer, Arka" and a Zodiac Time Beast; trigger unit from your drop zone, and bind them face up] Return this card to your hand.