How great would it be if in addition to walls and branches, objects could be grasped and climbed with? Statues, grates and all their ilk, used by invaders, adventurers and Dwarves alike to reach otherwise unreachable heights, or in the case of accidentally finding oneself on top of a door/statue, actually getting down.
It gets better with things like GCS webs, which can stay supported in the air.
The Fun to be had when you find a rare GCS lair!
Because as it stands it doesn't really seem right that spiders can't climb their own webs, and the situation where a Dwarf charges a web, mangles it and causes the spider and themself to plummet to the ground is currently not achievable. Being able to grasp objects for climbing would also provide a good basis for ladders and ropes!
If climbing creatures are implemented, I certainly want to see some kind of "climbing on ceilings" token. Maybe [CLIMBS_INNATE: 1] or [CLIMBS_INNATE: 2], like the current [BUILDINGDESTROYER] token.
We need giant cave geckos, seriously.
Then you could be ambushed by Giant Cave Spiders dropping down on your adventurer/dwarves from above.
[NEST_BUILDER: MATERIAL] Animal constructs nests out of the given material, stealing it from the local environs; their young congregate there, and eggs are placed there. Said nest is destroyed annually
It should probably be more than one year for the sturdier/bigger materials such as wooden logs.
Well, that might be true. Perhaps.
Another one:
[WALLCLIMBER] - Effectively gains Flying while in the vicinity of a wall. Needs grasper limbs to climb. Would be utterly horrifying if added to chasm creatures or - heaven forbid - Giant Cave Spiders.