Satan cast down to earth/A star with a tail signals the Mahdi

A 2nd Letter to the Tribulation: Comparing End Time Prophecies
Sections K15: Satan cast down to earth begins the seven-year tribulation,
and H15: Sharia is gone, only the unjust remain, then a star with a tail will signal the coming of the Mahdi

0:00 - Sections K15: :H15
0:35 - Revelation
6:15 - Hadiths
9:12 - Comparison

Hadith references
61. Narrated by Abd Allah ibn Amr ibn al-As, quoted in `Izzat, Muhammad Ibn, and `Arif, Muhammad, Al Mahdi and the End of Time, Dar al Taqwa press, London, second edition 2007. p.52. Abd Allah was author of Al-Sahifah al-Sadiqah (The Truthful Script), the first known hadith compilation document.
62. In Ka'b al-Ahbar, quoted in `Ibn Izzat p.21.