Hellfire Seal Dragon, Weathercloth

(This ability is active if you have four or more damage):When a Kagero rides this unit, choose your vanguard, and until end of turn, that unit gets +10000, choose up to two of your opponent's rear-guards, retire them, and your opponent looks at four cards from the top of his or her deck, searches for up to two grade 2 units from among them, call them to separate , and shuffles his or her deck.:When this unit attacks, if the number of rear-guards you have is more than your opponent's, this unit gets +2000 until end of that battle.