Rebellious Retainer of Fresh Blood, Frederick (RRR)

[Stride]-Stride Step-[Choose one or more cards with the sum of their grades being 3 or greater from your hand, and discard them] Stride this card on your (VC) from face down.
[ACT](VC):[Choose a card from your hand, and put it into your soul] This unit gets [Power]+1000 for each card in your soul until end of turn. If the sum of [Power] increased with this effect during this turn is 10000 or more, until end of turn, all of the rear-guards in your front row get [Power]+5000, and this ability cannot be activated.