New black commander deck

[Younghawk]

can you have  {Crypt Ghast} In a all black deck because of exort?

[Ekann1]

can you have  {Crypt Ghast} In a all black deck because of exort?

Yes you can have it, the color symbol is actually in the reminder text and so doesn't count

[Ekann1]

903.4b: Reminder text is ignored when determining a card's color identity. See rule 207.2.

903.4c The back face of a double-faced card (see rule 711) is included when determining a card's color identity.
Example: Civilized Scholar is the front face of a double-faced card with mana cost {2}{U}. Homicidal Brute is the back face of that double-faced card and has a red color indicator. The card's color identity is blue and red.