Gortegag

A type of assassin demon, described in Ur campaign notes:

An 8', winged, flaming, muscular humanoid, three faces – lion, wolf, dragon -- with curved horns of a ram armed with a steel scythe (like Death) and a tail like a scorpion.

Causes FRIGHT CHECK AT -3 penalty.

ST 30 (THR=3,SW=5D+2, strong enough to not ready the scythe, attacks every round)
IQ 14
DX 13
HT 15/45 
PD/DR: 4/9
MV: 7/7 (FLYING)
combat reflexes, high pain of course, 360-degree vision, instant regeneration
MAGIC RESISTANCE +3 (Academus will see this)
WEAPON DAMAGE: scythe (skill=DX=14) cuts at 5d+2 or impales at 5d (-2 to hit)

A demonologist might know that it's an assassin demon of significant strength, one of the larger ones the Black Ether were capable of summoning, difficult to control, and never present for long.