Dark Matter, The Astral Entity

Indestructible, protection from colored spells.
As long as Dark Matter the Astral Entity is on
the battlefield, each time an opponent loses life, they must exile that many cards at random from their library. If a card would be sent to the graveyard, it is exiled instead.
{6}, {t}: Target player draws 6 cards and loses 6 life or returns 6 permanents to their hand
and gains 6 life.