A, Raikage of The Cloud

Haste

When A, Raikage of The Cloud, enters the battlefield, look at the top five cards of an opponent's
library, then choose a creature card from among
them, then that opponent discards that card and
shuffles the rest back into their library.

If Killer Bee, 8-Tails Jinchuriki is on the battlefield
under your control and attacking at the same time
as A, they both have +2/+0 and first strike.