Crackling Emergence's replacement effect applies whether the enchanted land would be destroyed due to lethal damage or any other reason
However, after playing it, we can see why
Often loaded up with unique art, foiling techniques, and occasionally even serialized cards, these packs can mean big money
More importantly, the addition of Prized Amalgam gave Dredge a critical mass of free creatures, making it much closer to the Legacy and Modern versions of the deck
Between it and Hallowed Ground actually having a cross, some Christianity elements ended up still seeping in, huh
Its especially good if you have ways to benefit from other players sacrificing creatures