North Academy

At the beginning of your upkeep, if you control
two or more Elemental Warriors, you gain 1 life.
{t}: Add {u} to your mana pool.
{4}, {t}, Sacrifice North Academy: Search your
library for an Elemental Warrior creature card,
reveal it, put it into your hand, then shuffle your library. Activate this ability only if you control
three or more Elemental Warriors.