Great Shogun Seifried

Other Gladiator type creatures enter the
battlefield with Haste or a +1/+1 counter on
them.
When Great Shogun Seifried attacks, reveal the
top five cards of your Library, and you may
place one Gladiator type creature from among
them on the battlefield. If you placed, shuffle
your library. The placed creature can attack
during that combat phase.