"Escape to Salvation" - "Magnificent Retreat" [Campaign 4, Mission 4]

After the battles where all the characters fight the demons (Wolfsten, Frida, Kujin, and Ilaya capture the cities of Inferno), four groups of seven-level troops appear before Cog: free cyclops, black dragons, archangels, and lava dragons. The "Hero" already has several dozen, and if you let him level up, he can even reach a hundred ;). In one playthrough, I clicked Enter a thousand times just to level him up :).

Added after 38 seconds
Railag is last encountered in "Hammers of Fate." I sent his Tieru to the orcs. He hasn't been seen since :D.