Sadistic Space Slime Vira

+2: Place a -1/-1 counter on one creature underneath Vira. If this destroys targeted creature, exile it, Vira gains 1 energy per CMC of creature.
0: discard X ability counters from Vira. Do something that I haven't decided on yet.
-8: place one creature your opponent controls underneath Vira. This counts as exiling said creature.