Gate of Moonless Night

Gate of Moonless Night is an ability word exclusive to the Darkness Civilization.

Details
It is found on 卍 De Szak 卍 and De Szak, Demon Phoenix.

Reminder Text
The latest reminder text for Graveyard Kourin reads;

Color percentages
 As of DMRP-04, There is a total of 2 cards with the Gate of Moonless Night ability, which divide by civilization as such:
 * = 100% (1/1)