Aranlak, Soul Hunter

Plainswalk (This creature can't be blocked as long as defending player controls a plains))
{4}{b}, {t}: Destroy target creature. You lose 2 life
unless you have 4 or more experience counters.
You get an experience counter.
Whenever a creature dies, exile it and each
opponent loses X life, where X is equal to the
amount of experience counters you have.