Kay Khusrau kills Aila,
from Bayasanghor's (grandson of Timur) copy of the Shahnama by Ferdowsi.

f.335. Battle between Iran and Turan. The opposing armies are those of Iran led by Key-Khosrow, and those of Turan, under the command of Afrasiyab.
The encounter between Kay Khusrau and the three Turanian champions, Astaqila, Aila and Burzi-aila in full battle. When Khusrau saw Aila's heart and strength, he quickly drew his sharp sword from his belt; he struck him in the waist and cut him in two; he made the heart of the heroes full of fear.
Unesco