Use Gravekeeper's Recruiter to tribute summon into Gravekeeper's Chief, then use Gravekeeper's Chief to revive Gravekeeper's Recruiter, While Gravekeeper's Reccruiter searches your deck. This combo is an instant +1 for you, and can be improved and made more consistent by adding Enemy Controller to the mix. Use Enemy Controller and tribute Gravekeeper's Recruiter to take your opponent's monster, then use Gravekeeper's Recruiter to search for Gravekeeper's Chief. Tribute the controlled monster to summon Gravekeeper's Chief then Revive Gravekeeper' Recruiter. Not only is this Combo a +1 for you, but it also serves as monster removal.