Niv-Mizzet Reborn

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I made a Niv-Mizzet Reborn deck with a couple of pretty strict constraints:
• I'm using Jegantha as companion, so no duplicate mana symbols.
• I'm using creatures only. (I might build another version of this using only non-creatures. That would probably be a pretty weird build.)
I have several ways to blink (or bounce/recast) Niv-Mizzet, for his trigger.
 
Mana Acceleration (15): General (1): Spells (0): Sideboard (Omitted/Cut card ideas):
1 Leyline Prowler 1 Niv-Mizzet Reborn   1 Altered Ego
1 Llanowar Dead     1 Treasury Thrull
1 Skull Prophet Companion (1):   1 Bell Borca, Spectral Sergeant
1 Draconic Disciple 1 Jegantha, the Wellspring   1 Acolyte of Affliction
1 Leafkin Avenger     1 Baloth Null
1 Nikya of the Old Ways Creatures (48):   1 Knight of New Alara
1 Svella, Ice Shaper 1 Beledros Witherbloom   1 Chainer, Nightmare Adept
1 Atzocan Seer 1 Gyome, Master Chef   1 Pharika's Mender
1 Faeburrow Elder 1 Meren of Clan Nel Toth   1 Vial Smasher the Fierce
1 Karametra, God of Harvests 1 Dragonlord Kolaghan   1 Zagras, Thief of Heartbeats
1 Arixmethes, Slumbering Isle 1 Kaervek the Merciless   1 Cavern Harpy
1 Gyre Engineer 1 Kardur, Doomscourge   1 Ashiok, Nightmare Muse
1 Kiora's Follower 1 Lava Zombie   1 Consign // Oblivion
1 Weaver of Currents 1 Razing Snidd   1 Deny Reality
1 Rasputin Dreamweaver 1 Tsabo Tavoc   1 Doomsday Specter
  1 Dinrova Horror   1 Far // Away
Lands (36): 1 Evil Twin   1 Marsh Crocodile
1 Underground Sea 1 Fallen Shinobi   1 Recoil
1 Badlands 1 Ingenious Infiltrator   1 River's Grasp
1 Tundra 1 The Scarab God   1 Silumgar's Command
1 Taiga 1 Yuriko, the Tiger's Shadow   1 Tyrant's Scorn
1 Savannah 1 Ayli, Eternal Pilgrim   1 Kambal, Consul of Allocation
1 Bayou 1 Necrotic Sliver   1 Restoration Gearsmith
1 Scrubland 1 Shadrix Silverquill   1 Kaya, Ghost Assassin
1 Tropical Island 1 Teysa, Envoy of Ghosts   1 Orzhov Charm
1 Volcanic Island 1 Triad of Fates   1 Ravos, Soultender
1 Plateau 1 Vona, Butcher of Magan   1 Shivan Wurm
1 Crumbling Necropolis 1 Polis Crusher   1 Sparkcaster
1 Arcane Sanctum 1 Ruric Thar, the Unbowed   1 Horned Kavu
1 Savage Lands 1 Vithian Renegades   1 Dragonlord Atarka
1 Seaside Citadel 1 Fleetfoot Panther   1 Gruul Ragebeast
1 Jungle Shrine 1 Harmonic Sliver   1 Steel Leaf Paladin
1 Opulent Palace 1 Knight of Autumn   1 Trostani's Summoner
1 Sandsteppe Citadel 1 Qasali Pridemage   1 Aura Shards
1 Nomad Outpost 1 Adriana, Captain of the Guard   1 Gaddock Teeg
1 Frontier Bivouac 1 Brion Stoutarm   1 Hunting Grounds
1 Mystic Monastery 1 Foundry Champion   1 Duergar Hedge-Mage
1 Zagoth Triome 1 Gerrard, Weatherlight Hero   1 Leave // Chance
1 Indatha Triome 1 Hofri Ghostforge   1 Legion's Initiative
1 Savai Triome 1 Resolute Blademaster   1 Squee's Embrace
1 Ketria Triome 1 Parcelbeast   1 Species Gorger
1 Raugrin Triome 1 Progenitor Mimic   1 AEther Mutation
1 Alchemist's Refuge 1 Trygon Predator   1 Icefeather Aven
1 Ancient Ziggurat 1 Arjun, the Shifting Flame   1 Repudiate // Replicate
1 Command Tower 1 Dack's Duplicate   1 Selkie Hedge-Mage
1 Exotic Orchard 1 Jhoira of the Ghitu   1 Simic Charm
1 Path of Ancestry 1 Maverick Thopterist   1 Thrasios, Triton Hero
1 Pillar of the Paruns 1 Mercurial Chemister   1 Tishana, Voice of Thunder
1 Reflecting Pool 1 Protean Raider   1 Saheeli Rai
1 Reliquary Tower 1 Brago, King Eternal   1 Deputy of Acquittals
1 Sanctum of Eternity 1 Mistmeadow Witch   1 Angelic Shield
1 Volrath's Stronghold 1 Niambi, Esteemed Speaker   1 Banish into Fable
1 Winding Canyons 1 Raff Capashen, Ship's Mage   1 Dramatic Rescue
  1 Soulherder   1 Lavinia of the Tenth