Hmm... im thinking it could be Holy or more specificly Holy Materia

Held captive within, the four that make all, Held captive within the planet.
Disrupt its eternal rest - withdrawn from its sleep. Its been resting within the planet untill Aerith called it.
A large sacrifice, but rise to your call, A large sacrifice a.k.a Aerith being killed
To wreak havoc and destruction so deep. it wreaks havoc and destruction on the planet by causeing Geostigma
What am I? Holy/Holy Materia