D&D 5E Replacing Darkvision with other special senses

[doctorbadwolf]

Back on topic, I'd give Dwarven (or Gnomish?) tremorsense a decent radius, like 100' or more, but only if they use their action and don't move. It's kind of like listening to railroad tracks for approaching trains.

Combine that with the “ping” ability, and I’m all for it.