What about new undead units?

[Discontinuum]

There is a new unit https://units.wesnoth.org/1.18/mainline/en_US/Death%20Squire.html basically lvl 2 Death Knight that levels into Death Knight, maybe we can add it as another upgrade to Skeleton?

Also a line of Skeleton Riders from Eastern Invasion got mainlined https://units.wesnoth.org/1.18/mainline/en_US/Skeleton%20Rider.html https://units.wesnoth.org/1.18/mainline/en_US/Bone%20Knight.html maybe can add them in some role too?

[Dugy]

I remember there being a Death Squire unit, but I think its sprites were not very good so I didn't consider it. If the Death Squire and Skeleton Riders have animations, I am fine with taking them into LotI, since they could help connecting some advancement lines.

[Discontinuum]

Nowadays Wesnoth prefers to mainline animated units but I'll check it

[Discontinuum]

Yes, they are animated

[Dugy]

Cool, then we can take them into LotI.