How did the devill get out of heaven?

In various religious traditions, particularly within Christianity, the Devil, originally an angel named Lucifer, fell from grace due to his pride and desire to be equal to God. His rebellion against divine authority led to a cosmic battle in which he and his followers were cast out of Heaven. This narrative is often derived from interpretations of passages in The Bible, particularly in Isaiah 14:12-15 and Revelation 12:7-9, which depict his downfall and subsequent exile.