Gladiolus, Kings Shield

As long as Gladiolus is not your commander it has "Commander creatures you own have Hexproof, Trample and lifelink"

As long as Gladiolus is your commander it has "Whenever Gladiolus attacks look at the top 3 cards of your library, you may put a legendary creature onto the battlefield tapped and attacking. That creature gets hexproof until your next turn and has "When this creature attacks, at the end of combat step return this creature to its owners hand"."