I was wondering if you could also add the old SFX of satan

Just updated the mod to add glowing eyes (for Satan and Fallen), as well as some long awaited tweaks (like proper shadows under the statue and some forgotten details from Flash).

will a glowing eye effect be added?

It's obviously Accurate Void Bosses. Mods that change the visuals for the same enemy/boss/character/pickup shouldn't be enabled at the same time.
You can fix it by disabling one of the mods, or deleting the bosses's graphic files in one of the mods. It's usually an animation file (.anm2) and a spritesheet (.png).

Also, I know I marked the mod as AB+ mod, but it's entirely based on Repentance files and was tested in Repentance. I just figured it should work fine on AB+, since none of those bosses got any new attacks.

the Delirium form wings are glitchy for both The Fallen and for Satan -- not sure if this is an interaction with Accurate Void Bosses or if it's a Repentance thing

Why OH WHY is Satan doing the ahego face in the spritesheet

Thanks for pointing that out. I fixed his attack to be quicker, as well as Krampus's version too, since they both had the same pattern in flash.
I also removed costume changes, because I plan to upload them all in a separate mod with all the other changes based on the original TBoI.

The Fallen feels a bit easier with this mod on. I noticed that his brimstone attack uses the same amount of frames as Krampus, when the Fallen's version is only supposed to last 52 frames long, with the brimstone beam appearing on frame 20. I can't really assume if this is intentional or not, but just something I noticed. Other then that, I really like this mod. I always kinda preferred how Satan looked in Flash, and the Graphic Changes to The Fallen and other stuff is very appreciated too.

really good looking!

You don't know how much I appreciate this! I like how you changed the costumes of certain items, too!!

This looks so awesome! So nostalgic.

я уж думал ты сдох

what the other mod is

nice!

nice