Pain Elementals do the BFG 2704 attack (kind of)
painbfg.deh by Gokuma
gokuma.neocities.org

painbfg.deh
Old patch dated from the year 1999, kept for posterity or some crap like that.

painbfg2.deh
Juggled map id#'s of lost soul and dead lost soul, to put a restored lost soul back
in maps instead of having an inert blocking fireball.   Except since a bunch
of frames were used for the Pain Elemental's projectile, they have a new close attack
and no far attack or pain chance.

painbfgn.deh
Pain Elemental's projectiles not subjected to gravity.

This patch does NOT work with doom2.exe v1.666.
With doom2.exe v1.7, 1.7a, or 1.9, the fireballs slide on the ground instead of bouncing.
with Ultimate doom.exe running doom2.wad, the fireballs bounce like in any source port.

Tested fine with ZDoom and Doom Legacy back when I originally made it.
More recently tested fine with Odamex.

Do whatever you want with this.