Void Spectre

When Void Spectre enters the battlefield, if a
card entered any player's exile this turn, you
may gain 1 life and draw a card.
Void 1({4}{u/b}): You may cast this card from
exile for its void cost.
If Void Spectre entered the battlefield from exile,
create a 5/5 Spectre Horror token with flying
and lifelink.