Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Emergence of Christian Metal Core

Zao has long been a pillar in not only the Christian metalcore scene, but the mainstream as well. Zao has influenced the post-hardcore, metalcore, metal, and hardcore scenes more than most and this album was the catalyst. Harsh and high screams, brutal drumming (before it was all about "how fast can you play double bass"), and lyrics that have put intelligence back into this scene make this album a must for any Zao fan and one to check out to any fan of the scene.