The arrogance of Zceryll had fooled Makavoy into thinking he was ethereal and couldn't be harmed.
He came back to reality as a black cackling ball of energy hit him and he barely moved away avoiding most of the fire damage and the infernal damage!
The rider was a distraction
The Efreet was a distraciton
He needed to remove distractions!
Hasted, he moved across the battlefield towards the Efreet and extending his hand called a globe of solid fog around the Efreet and the rider blocking their movement as a dense barier.
Then he looked at the rider and the horse
Come get me you fool!
And became ethereal, this time for real.
Spoiler: OoC
Show
Move: Move around and away from the rider.
Standard: Burning a LvL 5 Slot to sculpt a Solid Fog as four 10' cubes two on the Efreet, avoiding Donald and two on the rider and horse avoiding any ally.
Swift: Swift etherealness
the solid fog is so thick that any creature attempting to move through it progresses at a speed of 5 feet, regardless of its normal speed, and it takes a -2 penalty on all melee attack and melee damage rolls.