What was unique with Elijah's altar was that God would ignite the offering with fire (or lightning) from heaven. The timing of this display made it the most spectacular religious event since the Exodus from Egypt.
Elijah's altar was notable for its connection to God's power and the dramatic nature of the offering being ignited by fire or lightning from heaven. This event was considered a significant religious spectacle, surpassing any other event since the Israelites left Egypt.