Guan Yu, Sainted Warrior

Creature — Legend    (CMC:5)

Horsemanship (This creature can't be blocked except by creatures with horsemanship.) When Guan Yu, Sainted Warrior is put into your graveyard from the battlefield, you may shuffle Guan Yu into your library.

12 ME3 • ENQiao Dafu

™ & © 1993—2009 Wizards of the Coast

Legal in: Legacy,Vintage,Commander

Oracle Text (click to copy):

10/1/2009
Despite the similarities between horsemanship and flying, horsemanship doesn't interact with flying or reach.
10/1/2009
If Guan Yu, Sainted Warrior is removed from the graveyard after the ability triggers but before it resolves, it won't get shuffled into your library.
10/1/2009
If a replacement effect has Guan Yu move to a different zone instead of being put into the graveyard, the ability won't trigger at all.