Gandalf, Returned Wizard

Other creatures you control get +1/+1.

Fellowship - As long as you control another
legendary creature, Gandalf gains 'When Gandalf
dies, you may put it on top of your library
instead.' and 'You can't lose the game and your opponents can't win the game."
'Courage will now be your best defense against the
storm at hand - that, and such hope as I bring.'