Steam Breath Dragon

(Hand):When you would discard cards from hand for the cost of your G unit's ability, you may discard this card as any grade 0 ~ 3. (This also includes the cost for ) :When this unit is placed on , if your vanguard has a Chrono icon, perform all of the following. ・ 1, look at the top seven cards of your deck, choose up to one grade 3 card from among them, reveal it and put it into hand, and shuffle the deck. If you did not reveal a card, 1. ・If your vanguard is grade 3 or greater, this unit gets +5000 until end of turn.