Iron Arm Dragon, Gargrex

:When this unit is rode upon by "Iron Emperor Dragon, Gargrex", 3, look at the top seven cards of your deck, choose up to two Dinodragon with different card names from among them, reveal them, choose a card from among the revealed cards, put it into hand, discard the rest of the revealed cards, and shuffle the deck. (Drop):If you have a grade 3 or greater Dinodragon vanguard, 3, and call this card to .