Leader's Talent

(Gain the next level as a sorcery to add its ability.) Whenever you attack, put a +1/+1 counter on target attacking creature. {2}{W}: Level 2 Whenever a creature you control leaves the battlefield, if it had a counter on it, you gain 2 life. {3}{W}: Level 3 Whenever you cast a spell, put a +1/+1 counter on each creature you control.