User blog comment:B214/Talk About What You Want! 2/@comment-24098614-20140818231513/@comment-1359322-20140819004053

Yes Euclid knew he was going to face the wyvern, but did Euclid know that the wyvern could use boost? No, even Euclid was surprised by that. Euclid only prepared to counter the wyvern that can divide and reflect, but then there suddenly, Issei shows that he could use boost and transfer on the wyvern too, and Issei even made use of the red wyvern to strengthen the attack reflected by the white wyvern.