From his oracle text:
Kinship - At the beginning of your upkeep, you may look at the top card of your library. If it shares a creature type with Wandering Graybeard, you may reveal it. If you do, you gain 4 life.
First of all, you cannot play anything with his ability, his ability merely grants you a life boost. However, and this is true for all kinship triggers, it always refers to sharing a creature type with it, so if the creature has 11 creature types, any one that matches one of those will do.