Activating the Godly Mode changes a few things in Black's gameplay:
-Performing Taunt and any Zamasu Assist fills up his Goldy meter.
-His throw, Power Charge and Focus Attack all get stronger if Zamasu is available and the Zamasu bar has at least one full stock:
--Throw becomes a launcher.
--Power charge fills Godly meter and will fill Power Bar faster if Godly is full.
--Focus Attack gains an additional hit of armor.
-He gains Up + 2K/2P Zetto Counters.
-Divine Cross costs LV2 instead of LV3 and cancels the Godly Mode upon activation.

Black's Godly Mode exiting strategy. Upon trying and failing to fuse together, Black and Zamasu burst appart (creating an air-unblockable energy pillar) but reform themselves into an army of clones which takes position in the background sky. The higher your Godly power bar Level at the moment of activation, the more clones are created. These clones will come onto the main stage and attack the opponent in a set pattern. Note that you can delay them from coming out by holding either MP or MK. This pattern is always identical but more attacks are added on higher Levels. Though on Level 1 these are all mid attacks, Level 2 adds a sweep and Level 3 adds an overhead.
Careful though. If Black is successfully attacked, the army will instantly dissipate.