PRISM-Promise, Princess Labrador (RRR)

[Stride] (Released when both players' vanguards are grade 3 or greater!)-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)[1/Turn]:[Choose a face down card named PRISM-Promise, Princess Labrador from your G zone, and turn it face up] If you have a heart card with PRISM in its name, choose two of your rear-guards, until end of turn, they get [Power]+5000, and [AUTO](RC):At the end of that battle that this unit attacked or boosted, you may return this card to your hand..