Omniscience Dragon, Afanc

-Stride Step-[Choose one or more cards with the sum of their grades being 3 or greater from your hand, and discard them] this card on your from face down. :[ 1 & Choose a face down card from your G zone, and turn it face up] Choose any number of your rear-guards, and until end of turn, they get ":This unit cannot be retired by card effects.", and for each rear-guard chosen with this effect, this unit gets +4000.