Originally Posted by
NegatorITA
for sure it gives reach and flexibility, but I too had the fear of the 4th color in general, I'd say that if black had access to a rightful 1 black removal, we wouldn't need of it.
Disfigure isn't often enough, because bolt can reach the opponent out, so in order to beat the side effect, I'd say we would need a black removal equal or similar to StP, which, the best we have atm, is dismember.
Unsure though, I've hardly played any delver without bolt, I guess I've to try a straight bug list before I can really say something.