"Blaster Blade" is on the field with a superior ride from "Future Knight, Llew", and both "Young Pegasus Knight" and "Great Sage, Barron" are in the rear-guard circles. At this point, what happens to the power of "Young Pegasus Knight" and "Great Sage, Barron"?
Both will get +12000 power. The cost for the ability of "Future Knight, Llew" is to put the 3 cards, "Future Knight, Llew", "Flogal" and "Barcgal" into the soul. Since "Blaster Blade" rides in the main phase due to a superior ride, the previous vanguard is placed in the soul. Therefore, the ability for both units activates 4 times each.
For the cost: "Counter-Blast(1) ＆ Choose a unit named "Future Knight, Llew", a unit named "Barcgal", and a unit named "Flogal" from your (RC), and put them into your soul]", does that mean that I can choose to perform either "[Counter-Blast(1)" or "Choose a unit named "Future Knight, Llew", a unit named "Barcgal", and a unit named "Flogal" from your (RC), and put them into your soul" to pay the cost?
No, you must pay both costs. The cost has not been paid if the conditions in the [ ] brackets have not been fufilled.
When searching the deck for a card, what happens if the card required cannot be found?
Nothing happens.Nothing is added to hand, no ride will take place, and you will continue with the rest of the resolution. In this case, since you have looked through the deck, you will have to shuffle it.