Tozgol, Eldritch Scholar

Ravenous Learner — Whenever you draw a
card, put a +1/+1 counter on Tozgol, Eldritch Scholar. This effect only triggers once per turn.

Body of Knowledge — Remove all +1/+1 counters from Tozgol, Eldritch Scholar: Add X {c} to your mana pool, where X equals the number of +1/+1 counters removed from Tozgol, Eldritch Scholar