Horsemen's Call

Split Second
Search your deck and graveyard for 4 Knight
type creatures with a mana cost of 5, add them to
your hand then shuffle your library.
—If you control no creatures or one commander
is out, put them on the battlefield instead.
—If both commanders are out, put them onto
the battlefield and they gain a +1/+1 counter
instead.
"We answer the call to protect... no matter what"
~ Four Horsemen