Jaret, the Found but Lost

When Jaret, the Found but Lost takes or deals
damage, you may exile it with a Lost counter
on it. As long as Jaret is exiled with a Lost
counter, whenever you play a land you may put
another Lost counter on Jaret. At the beginning
of your upkeep, you may remove all Lost
counters from Jaret and return him to the battlefield. For each Lost counter removed this
way, you gain 1 life and add {r} or {u}.