Yosei and Ao, Dawn Stars

Flying, vigilance

When Yosei and Ao, Dawn Stars dies. Target
opponent taps up to seven target permanents
they control. Look at the top seven cards of
your library. Put any non-land permanents with
a mana value of X or less, where X is seven minus
the number of permanents tapped. Put the rest on
the bottom of your library in random order. That
player skips their next untap phase