Order Cleric Class

(Gain the next level as a sorcery to add its ability.)
Whenever a creature enters the battlefield under
your control, you gain 1 life.
{w}{b}: Level 2
At the beginning of combat on each turn, if you
gained life this turn, tap target creature.
{1}{w}{b}: Level 3
Whenever an opponent casts a noncreature spell,
that player loses 2 life and you gain 2 life.