Arachnatron

Whenever a nontoken creature an opponent controls dies, exile it.

{2}{b}, Put a creature exiled with Arachnatron into its owner's graveyard: Put two +1/+1 counters on Arachnatron. Draw a card.

{x}{1}{b}: Put target creature card with mana value X exiled with Arachnatron onto the battlefield tapped under your control.