I'll have to come back later with more stuff, but Neheb's effect is very good at getting Cogwork Assembler and Doubling Cube online as an infinite mana engine, and a strong Neheb deck should have plenty of things it can use either of those two for outside of the combo.
1.) When Worldgorger Dragon enter the battlefield, tap Kiki-Jiki to create another Worldgorger.
~the trigger for "When Worldgorger Dragon enters the battlefield, exile all other permanents you control." is on the stack.
2.) When the second Worldgorger is created another "When Worldgorger Dragon enters the battlefield, exile all other permanents you control." trigger is placed on the stack.
3.) When that trigger resolves all other permanents will be exiled, including Kiki and the "real" Worldgorger, along with lands, etc.
4.) The trigger for the "real" Worldgorger "When Worldgorger Dragon leaves the battlefield, return the exiled cards to the battlefield under their owners' control." will go onto the stack.
~this does nothing as it didn't have anything exiled as the original trigger is still on the stack.
5.) The trigger for the "real" Worldgorger "When Worldgorger Dragon enters the battlefield, exile all other permanents you control." will resolve and this will exile the token copy of Worldgorger.
6.) The trigger for the token copy of Worldgorger "When Worldgorger Dragon leaves the battlefield, return the exiled cards to the battlefield under their owners' control." will go onto the stack, and resolve.
~this returns the Kiki-Jiki and "real" Worldgorger to play, along with untapped lands, and you are exactly back to Step 1) where you can keep repeating this loop getting infinite mana and ETB triggers with other permanents.
When you are ready to stop, don't make a token copy of Worldgorger, all your permanents will be exiled (except Worldgorger), but you have infinite mana, and assumes you have some win method from there.
here's my deck
https://tappedout.net/mtg-decks/01-03-19-neheb-the-eternal/?cb=1552601572
Really the main problem is finding them with hardly any tutors.
EDH Primers
Phelddagrif - Zirilan
EDH
Thrasios+Bruse - Pang - Sasaya - Wydwen - Feather - Rona - Toshiro - Sylvia+Khorvath - Geth - QMarchesa - Firesong - Athreos - Arixmethes - Isperia - Etali - Silas+Sidar - Saskia - Virtus+Gorm - Kynaios - Naban - Aryel - Mizzix - Kazuul - Tymna+Kraum - Sidar+Tymna - Ayli - Gwendlyn - Phelddagrif 4 - Liliana - Kaervek - Phelddagrif 3 - Mairsil - Scarab - Child - Phenax - Shirei - Thada - Depala - Circu - Kytheon - GrenzoHR - Phelddagrif - Reyhan+Kraum - Toshiro - Varolz - Nin - Ojutai - Tasigur - Zedruu - Uril - Edric - Wort - Zurgo - Nahiri - Grenzo - Kozilek - Yisan - Ink-Treader - Yisan - Brago - Sidisi - Toshiro - Alexi - Sygg - Brimaz - Sek'Kuar - Marchesa - Vish Kal - Iroas - Phelddagrif - Ephara - Derevi - Glissa - Wanderer - Saffi - Melek - Xiahou Dun - Lazav - Lin Sivvi - Zirilan - Glissa
PDH - Drake - Graverobber - Izzet GM - Tallowisp - Symbiote Brawl - Feather - Ugin - Jace - Scarab - Angrath - Vraska - Kumena Oathbreaker - Wrenn&6
Most Used (of many dozens) EDH Decks:
Brago, King Eternal - Stax
Grenzo, Dungeon Warden - Aggro Combo
Wort, the Raidmother - Spellslinger Swarm Control
Animar, Soul of Elements - Tempo Combo
Yidris, Maelstrom Wielder - Spellslinger
Exodia the Forbidden One:
Oona, Queen of the Fae - Combowins.dec
EDH Primers
Phelddagrif - Zirilan
EDH
Thrasios+Bruse - Pang - Sasaya - Wydwen - Feather - Rona - Toshiro - Sylvia+Khorvath - Geth - QMarchesa - Firesong - Athreos - Arixmethes - Isperia - Etali - Silas+Sidar - Saskia - Virtus+Gorm - Kynaios - Naban - Aryel - Mizzix - Kazuul - Tymna+Kraum - Sidar+Tymna - Ayli - Gwendlyn - Phelddagrif 4 - Liliana - Kaervek - Phelddagrif 3 - Mairsil - Scarab - Child - Phenax - Shirei - Thada - Depala - Circu - Kytheon - GrenzoHR - Phelddagrif - Reyhan+Kraum - Toshiro - Varolz - Nin - Ojutai - Tasigur - Zedruu - Uril - Edric - Wort - Zurgo - Nahiri - Grenzo - Kozilek - Yisan - Ink-Treader - Yisan - Brago - Sidisi - Toshiro - Alexi - Sygg - Brimaz - Sek'Kuar - Marchesa - Vish Kal - Iroas - Phelddagrif - Ephara - Derevi - Glissa - Wanderer - Saffi - Melek - Xiahou Dun - Lazav - Lin Sivvi - Zirilan - Glissa
PDH - Drake - Graverobber - Izzet GM - Tallowisp - Symbiote Brawl - Feather - Ugin - Jace - Scarab - Angrath - Vraska - Kumena Oathbreaker - Wrenn&6
It does, and it's in Tyler's list.
Most Used (of many dozens) EDH Decks:
Brago, King Eternal - Stax
Grenzo, Dungeon Warden - Aggro Combo
Wort, the Raidmother - Spellslinger Swarm Control
Animar, Soul of Elements - Tempo Combo
Yidris, Maelstrom Wielder - Spellslinger
Exodia the Forbidden One:
Oona, Queen of the Fae - Combowins.dec
Hateflayer/Goblin Sharpshooter + Elemental Mastery + Phyrexian Altar/Thermopod = infinite damage and infinite tokens
Sword of Feast and Famine + Aggravated Assault/Hellkite Charger = infinite combat phases as long as you deal combat damage.
Kiki-Jiki, Mirror Breaker + Worldgorger Dragon = infinite mana and infinite ETB of permanents you control.
Kiki-Jiki, Mirror Breaker + Combat Celebrant = infinite combat steps.
Niv-Mizzet Reborn
Feather, the Redeemed
Estrid, the Masked
Teshar
Tymna/Ravos
Najeela, Blade-Blossom
Firesong & Sunspeaker
Zur the Enchanter
Lazav, the Multifarious
Ishai+Reyhan
Click images for decks->
-Prime Speaker Vannifar
---------------------Will & Rowan Kenrith
1.) When Worldgorger Dragon enter the battlefield, tap Kiki-Jiki to create another Worldgorger.
~the trigger for "When Worldgorger Dragon enters the battlefield, exile all other permanents you control." is on the stack.
2.) When the second Worldgorger is created another "When Worldgorger Dragon enters the battlefield, exile all other permanents you control." trigger is placed on the stack.
3.) When that trigger resolves all other permanents will be exiled, including Kiki and the "real" Worldgorger, along with lands, etc.
4.) The trigger for the "real" Worldgorger "When Worldgorger Dragon leaves the battlefield, return the exiled cards to the battlefield under their owners' control." will go onto the stack.
~this does nothing as it didn't have anything exiled as the original trigger is still on the stack.
5.) The trigger for the "real" Worldgorger "When Worldgorger Dragon enters the battlefield, exile all other permanents you control." will resolve and this will exile the token copy of Worldgorger.
6.) The trigger for the token copy of Worldgorger "When Worldgorger Dragon leaves the battlefield, return the exiled cards to the battlefield under their owners' control." will go onto the stack, and resolve.
~this returns the Kiki-Jiki and "real" Worldgorger to play, along with untapped lands, and you are exactly back to Step 1) where you can keep repeating this loop getting infinite mana and ETB triggers with other permanents.
When you are ready to stop, don't make a token copy of Worldgorger, all your permanents will be exiled (except Worldgorger), but you have infinite mana, and assumes you have some win method from there.
Niv-Mizzet Reborn
Feather, the Redeemed
Estrid, the Masked
Teshar
Tymna/Ravos
Najeela, Blade-Blossom
Firesong & Sunspeaker
Zur the Enchanter
Lazav, the Multifarious
Ishai+Reyhan
Click images for decks->
-Prime Speaker Vannifar
---------------------Will & Rowan Kenrith
How does this one work?
Shu Yun, the Silent Tempest WUR Voltron Control
Temmet, Vizier of Naktamun WU Unblockable Mirror Trickery
Ra's al Ghul (Sidar Kondo) and Face-Down Ninjas
Brudiclad, Token Engineer
Vaevictis (VV2) the Dire Lantern
Rona, Disciple of Gix
Tiana the Auror
Hallar
Ulrich the Politician
Zur the Rebel
Scorpion, Locust, Scarab, Egyptian Gods
O-Kagachi, Mathas, Mairsil
"Non-Tribal" Tribal Generals, Eggs
I think they meant Helm of the Host
Legacy - Solidarity - mono U aggro - burn - Imperial Painter - Strawberry Shortcake - Bluuzards - bom