Louis, Harsh Mentor

Whenever a +1/+1 counter would be placed on a creature you control, instead you gain that many Experience Counters.
Other creatures you control have +1/+1 for each Experience Counter you have.
{2}{b}{g}{u}: Return Louis, Harsh Mentor from the Graveyard to the battlefield. Then remove X
Experience Counters from yourself and gain X
life where X is the number of creatures on the battlefield.