Boro, the Traveling Mage

Player (Creatures blocked by Boro gain trample until end of turn. Boro cannot be removed from the battlefield.)
Whenever a creature enters the battlefield, if Boro is untapped, you may tap him. If you do, that creature's controller may gain 1 life and scry 1.
Mana Pool - {w/u} (During your untap step add {w} or {u} to your mana pool, this mana doesn't empty
as steps, phases, and turns end.)