Believe it or not Tangle Spider also has a rare version from Darksteel. See here:
https://scryfall.com/card/dst/85/tangle-spider
So it also dies to Rare-B-Gone.
Do you run all 10 Guilds?
Do they all have a man land?
I think man lands are super interesting but they are also wildly unbalanced compared to each other. Where Fetch, Duels, Shock and Surveil are 100 % identical.
Have you given this any thoughts?