Satan

1st Phase
Upon entering his lair, you will fight The Fallen.

2nd Phase
Once Fallen is dead, Satan will stand up and move to the upper wall.

Attacks
Satan will fire brimstone from his face, any Issacs in below his face will be murdered.

Satan extends both arms and fires a stream of large, slow moving tears in a circle.

Satan fires two volleys of tears, one having five and the second having six massive tears.

3rd Phase
Once you've killed Satan he flies up to the roof and stomps on you like Mom, but this time not having doors and having  TWO  feet. He will also spawn a bunch of Kamikaze Leeches.