Dual Blades

[gvn1999]

As Maroon said before it´s just impossible to do such things with the current Warband engine!
And if I heard right it wont be possible in Bannerlord [Lets wait for NordInvasion+M&B III then ], you would need to overwrite /change all the current movement actions and add new ones which quite takes some time.

Spoiler

And attack helicopters!

with

Deployable ballistas that shoot barrels from a 50 barrel stack You can refill xD

yea [called MrG´s Helicopter lol]