Monogold means we can only use cards that have a multi-colored or colorless identity, similar to the way a mono-red deck can only use cards that have a red or colorless identity.
I'm not going to lie to you; this is a very tough deck-building restriction. Much of the primary ramp, tutor, and draw commonly used in Commander are not available to you. This problem is especially noticeable when assembling a 5-color mana base.
However, multicolor's biggest advantage is its finishers which are generally quite good, but getting to the finish is difficult. This also means it's hard to commit to any one strategy, forcing this deck into the category of goodstuff.
Use Bolas's +1
Blink Bolas with Aminatou, then blink Aminatou with Bolas
Repeat the above 2 steps until all opponents permanents and hands are exiled.
Holding counterspells, pass the turn twice and then ult Bolas for the win!
I've often considered doing something similar, but the closest I ever got was my Joker deck, which has a multicolor subtheme. If you ever relax your restriction, Urza's Filter and Pyroconvergence are gems in a deck like this.
I KNOW! I've been toying with the idea of expanding to at least monocolor cards with other symbols in their rules text. For example, Noble Hierarch. Unfortunately, it looks very out of place when all of the others have a gold border. That's why I haven't included any hybrids either. But can you imagine if I could play stuff like Bloom Tender??
4 year update: We have a good monogold Commander now... Niv-Mizzet Reborn!!
I don't have the opportunity to play Magic nearly as much as I used to or would like to so I've been having trouble with this deck a bit, mainly with how to close out the game.
Are there any combos with these deck restrictions? Have I missed some obvious includes? Advice appreciated!
EDIT: Also, I think I'm going to allow hybrid cards for 2 reasons: First, they work as expected with Niv-Mizzet. Second, addressing my distaste for not seeing silver or gold borders while flipping through the deck... I already make custom versions for all old-bordered cards since I like having all modern frame anyway, so I might as well make custom gold bordered versions of hybrid cards too.
Monogold Niv-Mizzet
Monogold means we can only use cards that have a multi-colored or colorless identity, similar to the way a mono-red deck can only use cards that have a red or colorless identity.
I'm not going to lie to you; this is a very tough deck-building restriction. Much of the primary ramp, tutor, and draw commonly used in Commander are not available to you. This problem is especially noticeable when assembling a 5-color mana base.
However, multicolor's biggest advantage is its finishers which are generally quite good, but getting to the finish is difficult. This also means it's hard to commit to any one strategy, forcing this deck into the category of goodstuff.
How do you win?
The general strategy is attrition. Drop a few planeswalkers, then use the card advantage from Niv-Mizzet to protect them. There's also the easy combo of Brago + Aurelia, and the more difficult Oath of Teferi + Aminatou, the Fateshifter + Nicol Bolas, Dragon-God. All of these cards are fetchable with Captain Sisay and in fact, the latter can win on the turn you untap with her:
Tutor for and cast Kiora, Behemoth Beckoner, untapping Sisay
Tutor for and cast Aminatou, the Fateshifter, blinking Kiora to untap Sisay
Tutor for and cast Nicol Bolas, Dragon-God, using Kiora's loyalty ability to untap Sisay
Tutor for and cast Oath of Teferi, exiling something unimportant.
Blink Bolas with Aminatou, then blink Aminatou with Bolas
Repeat the above 2 steps until all opponents permanents and hands are exiled.
Holding counterspells, pass the turn twice and then ult Bolas for the win!
And just think, it only costs 5WWUUUBBBBR(G/U)!
Creatures (21)
1 Avacyn's Pilgrim
1 Deathrite Shaman
1 Elves of Deep Shadow
1 Noble Hierarch
2 Coiling Oracle
2 Kiora's Follower
2 Lazav, the Multifarious
2 Zhur-Taa Druid
3 Derevi, Empyrial Tactician
3 Edric, Spymaster of Trest
3 Gyre Engineer
3 Knight of the Reliquary
3 Selvala, Explorer Returned
3 Tymna the Weaver
4 Brago, King Eternal
4 Captain Sisay
4 Dack's Duplicate
4 Grand Arbiter Augustin IV
4 Notion Thief
5 The Scarab God
6 Aurelia, the Warleader
Instant (18)
1 Wear // Tear
2 Assassin's Trophy
2 Countersquall
2 Dovin's Veto
2 Eladamri's Call
2 Growth Spiral
2 Lim-Dûl's Vault
2 Manamorphose
2 Signal the Clans
2 Turn to Mist
2x Aurelia's Fury
3 Anguished Unmaking
3 Congregation at Dawn
3 Fire Covenant
3 Ionize
4 Utter End
2 Altar of Bone
2 Neoform
2 Reborn Hope
2 Treasured Find
3 Repudiate // Replicate
3 Supply // Demand
4 Jarad's Orders
4 Supreme Verdict
5 Bring to Light
7 Primevals' Glorious Rebirth
Artifact (5)
1 Sol Ring
2 Fellwar Stone
2 Talisman of Curiosity
2 Talisman of Unity
3 Chromatic Lantern
Enchantment (4)
2 Legion's Initiative
3 Aura Shards
5 Mirari's Wake
5 Oath of Teferi
Planeswalkers (7)
2x Nissa, Steward of Elements
3 Aminatou, the Fateshifter
3 Dack Fayden
3 Kiora, Behemoth Beckoner
3 Teferi, Time Raveler
4 Xenagos, the Reveler
5 Nicol Bolas, Dragon-God
Lands (36)
1 Command Tower
1 City of Brass
1 Mana Confluence
1 Exotic Orchard
1 Forbidden Orchard
1 Pillar of the Paruns
1 Flooded Strand
1 Polluted Delta
1 Bloodstained Mire
1 Wooded Foothills
1 Windswept Heath
1 Misty Rainforest
1 Verdant Catacombs
1 Marsh Flats
1 Arid Mesa
1 Scalding Tarn
1 Underground Sea
1 Badlands
1 Taiga
1 Savannah
1 Scrubland
1 Volcanic Island
1 Bayou
1 Plateau
1 Tropical Island
1 Hallowed Fountain
1 Watery Grave
1 Blood Crypt
1 Stomping Ground
1 Temple Garden
1 Godless Shrine
1 Steam Vents
1 Overgrown Tomb
1 Sacred Foundry
1 Breeding Pool
8 6 1 3 9
4 3 5 4 10
C: 4, mono: 3, tri-color: 3, land: 36
W 27 U 29 B 16 R 13 G 32
2 April 19 - Underperformers
- Nin, the Pain Artist, Hull Breach, Azorius Signet, Dimir Signet, Golgari Signet, Izzet Signet, Orzhov Signet, Selesnya Signet
+ Deathrite Shaman, Urza's Filter, Coiling Oracle, Manamorphose, Llanowar Dead, Radha, Heir to Keld, Lord Windgrace, Growth Spiral
11 April 19 - More Niv synergy
-Expedition Map, Sensei's Divining Top, Commander's Sphere, Coalition Relic Urza's Filter, Nicol Bolas, God-Pharaoh, Knotvine Mystic, Muldrotha, the Gravetide, Sen Triplets, Lord Windgrace, Villainous Wealth, Wargate, Crackling Doom, Sphinx's Revelation, Steam Augury, Maelstrom Wanderer, Whispering Madness, Aurelia, the Warleader
+Dovin's Veto, Oath of Teferi, Venser, the Sojourner, Hostage Taker, Domri, Anarch of Bolas, Safewright Quest, Kaya, Ghost Assassin, Countersquall, Repudiate // Replicate, Turn to Mist, Legion's Initiative, Kiora, Behemoth Beckoner, Wear // Tear, Squandered Resources, Trace of Abundance, Merciless Eviction, Fieldmist Borderpost
12 April 19 - Tuning
-Daxos of Meletis, Hostage Taker, Medomai the Ageless, Trace of Abundance, Merciless Eviction, Venser, the Sojourner, Unexpected Results, Legion's Initiative, Kaya, Ghost Assassin
+Brago, King Eternal, Aminatou, the Fateshifter, Tymna the Weaver, Grenzo, Dungeon Warden, Altar of Bone, Jarad's Orders, Knight of the Reliquary, Unfulfilled Desires, Neoform
1 May 19 - Focus on Wincons
-Psychic Strike, Supreme Verdict, Domri, Anarch of Bolas, Grenzo, Dungeon Warden, Unfulfilled Desires, Havengul Lich
+Aurelia, the Warleader, Time Wipe, Congregation at Dawn, Primevals' Glorious Rebirth, Bring to Light, Lazav, the Multifarious
29 May 19 - Mana rocks
-Simic Signet, Wildfield Borderpost
+Talisman of Curiosity, Talisman of Unity
4 June 19 - Mana tutors
-Jhessian Zombies, Sanctum Plowbeast, Safewright Quest, Time Wipe
+Supply // Demand, Legion's Initiative, Domri, Anarch of Bolas, Supreme Verdict
25 June 19 - Lighten restriction to color-identity, not card color
-Squandered Resources, Kiora, the Crashing Wave, Domri, Anarch of Bolas, Llanowar Dead, Radha, Heir to Keld
+Teferi, Time Raveler, Avacyn's Pilgrim, Elves of Deep Shadow, Noble Hierarch, The Scarab God
cEDH: [G(U/R) Animar] - [(U/B)(G/W) Redless Wheels] - [(G/U)(W/B) Redless Pod] - [(B/G)W Ghave Metapod]
Ramp
3 Knotvine Mystic
4 Arixmethes, Slumbering Isle
4 Mina and Denn, Wildborn
Artifact
2 Talisman of Progress
2 Azorius Signet
3 Commander's Sphere
3 Coalition Relic
4 Kiora, Master of the Depths
4 Ral Zarek
4 Unexpected Results
5 Cadaverous Bloom
5 Sarkhan Unbroken
Card Advantage
2 Igneous Pouncer
2 Nin, the Pain Artist
3 Daxos of Meletis
5 Sen Triplets
6 Medomai the Ageless
6 Prime Speaker Zegana
8 Maelstrom Wanderer
2 Izzet Charm
3 Perplex
3x Sphinx's Revelation
3x Villainous Wealth
4 Ancient Excavation
4 Steam Augury
4 Whispering Madness
5 Bring to Light
1 Sensei's Divining Top
3 Dack Fayden
Removal
2 Hull Breach
3 Abzan Charm
3 Crackling Doom
3 Maelstrom Pulse
3 Putrefy
3 Sultai Charm
3 Voidslime
6 Merciless Eviction
7 Nicol Bolas, God-Pharaoh
8 Nicol Bolas, Planeswalker
Misc. Explained
Marchesa, the Black Rose - Protection/recursion and buffs our creatures.
Olivia Voldaren - Removal / creature theft / evasive beater
Aurelia, the Warlead - Combat
Gisela, Blade of Goldnight - One of the best beaters and creature buffers. Also a beautiful card.
Dragonlord Dromoka - Protection!
Primevals' Glorious Rebirth - Mass revival of legendaries and planeswalkers
Lands
1x Alchemist's Refuge
1x Ancient Ziggurat
cEDH: [G(U/R) Animar] - [(U/B)(G/W) Redless Wheels] - [(G/U)(W/B) Redless Pod] - [(B/G)W Ghave Metapod]
I've often considered doing something similar, but the closest I ever got was my Joker deck, which has a multicolor subtheme. If you ever relax your restriction, Urza's Filter and Pyroconvergence are gems in a deck like this.
cEDH: [G(U/R) Animar] - [(U/B)(G/W) Redless Wheels] - [(G/U)(W/B) Redless Pod] - [(B/G)W Ghave Metapod]
I don't have the opportunity to play Magic nearly as much as I used to or would like to so I've been having trouble with this deck a bit, mainly with how to close out the game.
Plan A: Attrition. Nicol Bolas, Dragon-God or Gisela, Blade of Goldnight while protecting them or using stax pieces like Grand Arbiter?
Plan B: Sen Triplet, Havengul Lich, and Villainous Wealth to play my opponents things. Maybe add more theft with Merieke Ri Berit? Dragonlord Silumgar? Slotting Olivia Voldaren back in?
Are there any combos with these deck restrictions? Have I missed some obvious includes? Advice appreciated!
EDIT: Also, I think I'm going to allow hybrid cards for 2 reasons: First, they work as expected with Niv-Mizzet. Second, addressing my distaste for not seeing silver or gold borders while flipping through the deck... I already make custom versions for all old-bordered cards since I like having all modern frame anyway, so I might as well make custom gold bordered versions of hybrid cards too.
cEDH: [G(U/R) Animar] - [(U/B)(G/W) Redless Wheels] - [(G/U)(W/B) Redless Pod] - [(B/G)W Ghave Metapod]