Text (AR+errata): 5/4. ; Whenever ~this~ or another creature you control with power 5 or greater is put into a graveyard from the battlefield, you may gain 5 life. [Oracle 2009/07/08]
This will trigger when Mycoid Shepherd goes to the graveyard, regardless of its power at the time. If any other creature goes to the graveyard, this only triggers if its power is 5 or greater. [Alara Reborn FAQ 2009/04/30]
