Hey, sorry if that was answered already but cant find it.

Can a hero with Spiritwalker stay in town and use another hero down in the dungeon?

Mcmanus said:

No. Range of effects is counted space to space via adjacency. In town is not adjacent to any other other space, even though you can move to a glyph for 1 MP. Therefore you can't count range from town...

We thought so, thank you =)