Changing Wanderer Scroll from the King on Vestlig

[Belgarath]

Hey guys, i am going for a Skald playthrough as i've gotten bored with my Soothsayer...
I want to build a Dragon/Archdemon army, loved that combo in Armored Princess...

Now i want to make sure i get a scroll of Call Colossus early on, so my Raven can start cranking them out... The first reliable instance of getting a Wanderer Scroll is from king Hauck after dealing with the rebels...

Now i'm pretty sure i've read on these forums you can change what scroll you get by changing certain variables? I've tried summoning creatures from egs/seeds etc like you do when using a Scroll of say Call Colossus but that does not seem to work... I've tried playing with my troop composition, and now somehow the scroll changed from Flaming Eyes to Song of the Wind, but i cannot get it to change further...

Any tips on how to achieve this?

Another question, are there certain items from the earlier games which are no longer present? I'd love to get my hands on a Drakonix, but i have scanned a lot of save games and never found one... Sandals of the Martyr also seem to be gone? (Both go really well with the army i have in mind...)

Thanks for any advice!