Northumbria, Northland

Northumbria, Kingdom of the North enters
the battlefield tapped.
{t}: Add {g} or {w}.
{t}, Sacrifice Northumbria, Kingdom of the North: Search your library for a Warrior creature card and put it into your hand. Shuffle your library afterward.
Whenever you cast a creature spell, you may gain 1 life if that creature’s toughness is 4 or greater.