I am interested in buys some terrain from https://shop.tinkerhousegames.com/ . I want to know are there rules for using stairs and ladders in Legion. I know there are the vertical movement and climb and clamber rules, but I don't see any thing about using Stairs and Ladders. Any input would be welcome.

Thanks

Stairs and ladders allow you to clamber without rolling dice to take wounds. The same rules apply though, the unit leader needs to be in base contact with the terrain etc.

If you have stairs that are deep enough for models to stand on you can just treat them as difficult or open terrain depending on what you and your opponent agree on before the game.