Servant for the Master

When this card enters the battlefield, you
gain 5 life.
{t}: Add {1} to your mana pool; Gain 1 life.
You can play 2 lands per turn from now on.
Creatures cost {3} less to cast. If their casting
cost is under {3}, pay {1}.
Spells cost {4} less to cast. If their casting
cost is under {4}, pay {2}.