This card seems Vintage-unplayable to me. It's true that it does have a non-zero effect in a variety of matchups, and that weak but versatile cards are frequently underestimated. But I can't get too excited about this card:
- against Shops, this card is mainly useful for its artifact destruction ability (since most Shops threats these days are creatures). However RG is an awkward Vintage casting cost even in the best of circumstances, never mind when you're under pressure from Wastelands and spheres.
- as has mentioned earlier in the thread, a single copy of Cinder Lash is a speed bump, but not fully effective, at stopping Tendrils-based combo. You need to get multiple copies into play to match the security of Kembal, Eidolon of the Great Revel, et al, and the upside of Cinder Lash (sniping an artifact with PO on the stack, for instance) does not make up for the lower damage rate.
- likewise, against a Xerox deck, Cinder Lash applies slow but steady life pressure. That's not a terrible effect, but as with PO, playing Cinder Lash feels much weaker than playing and attacking with Kembal et al.
- Cinder Lash does very little against creature-based aggro decks like humans, eldrazi, or Survival (you do get to pick off Survival of the Fittest, if they expose it without immediately putting themselves in a winning position) and stone nothing against Dredge.
So as I said, I'm not too excited about Cinder Lash. It doesn't feel strong enough against a wide enough slice of the metagame to be worth playing maindeck. In the sideboard, I'd rather have strong anti-Shops tools, and strong anti-combo tools, rather than Cinder Lash which combats both, but not very effectively.