Revealing Gaze

Target player reveals their hand. You choose a creature card from that player's hand and exile
it. You may cast that card for as long as it
remains exiled, and you may spend mana as
though it were mana of any color to cast that
spell. If you cast a creature this way, it is a blue
and black Abyssal in addition to its other types.

In the deepest depths, some creatures have given up on
sight altogether. Others went to extreme lengths to
capture the slightest beam of light...