This paper assists in understanding contesting technological capabilities and doctrinal modification between India and Pakistan that are drifting South Asia towards instability, leaving the nuclear deterrence in a dark abyss. Hawks on both sides of the nuclear armed rivals are unprecedentedly chanting threats of nuclear war. More bothersome is the indications of shifting the Indian policy of No First Use (NFU), calls for doctrinal modifications and counterforce temptations. An Indian quest for escalation dominance and Pakistani quest for stability against India is in fact a mutual struggle beyond ‘minimum credible’ to ‘assured second strike’ capabilities.