Bogbrew Witch (creature) lets you search for Festering Newt(black 1/1 Creature) or Bubbling Cauldron(artifact) With Bubbling Cauldron, you can sacrifice Festering Newt and hit all opponents for 4 damage, gaining all the life they lost this way.
Bringer of the Black Dawn(creature) lets you pay two life and search library for a card, put into hand.
Cruel Tutor(sorcery) lets you search your library for any card.
*Cynical Loner(Creature) it’s a Human Survivor, but if gets tapped somehow, at the main phase after the combat phase allows your library for a card and put into grave yard. Good if you have something that lets you pull cards from your graveyard.
Dark Petition(sourcery) search your library for a card, put into hand. If two or more instant/sorcery cards in graveyard, also add three black to your mana pool.
TJ’s deck can use these better than the above.
Deck needs to fix five color needs for mana, lots of fetch, fix creature types to Sliver and Elf, globally buff, provide global attributes to all creatures.
One possible commander first followed by lands so no more mana screwed.
Jegantha, the Wellspring(Legendary creature) costs 4generic plus R or G to play. Tap it to generate all five colors. Can’t be used for colorless costs.
This commander costs 5 to get on the table then produces 5 every turn and you would never be mana screwed once in play. Also eliminates the need for extra of the same color on any future summoning costs.
Now on to lands, so no chance of shortage of any color mana.
Crystal Quarry(land) Tap for one colorless. pay 5 and tap for one of each color.
Leyline Immersion(Enchantment) enchant a legendary. Tap it for 5 in any color combination.
Dryad of the Ilysian Grove(creature) gives any land ability to tap for any color.
Joiner Adept(creature) lands you control have; add one mana of any color.
Chromatic Lanturn(Artifact) tap for one of any color. Static ability, gives all land ability to tap for one of any color.
Chromatic Orrery(artifact) cost 7 colorless. Static ability all many can be used as any color. Taps for 5 generic.
Dune chanter(creature) lands get; add one mana of any color.
Time Lotus(artifact) cost 5 colorless to play. Tap to add one of each color.
Arcane Signet(artifact) taps for one in the commanders profile.
Manalith(artifact) taps for one of any color.
These are all lands. Public Thoroughfare, Transguild Promenade or Gateway Plaza, Shimmering Grotto, Hidden Grotto, Crystal Grotto, Study Hall, Hall of Oracles, or Great Hall of the Citadel each has different mechanics but all allow for a mana of any color.
Demonic Tutor(sorcery) search library for a card, put into hand.
Diabolic Tutor(sorcery) search library for a card, put into hand.
Diabolic Intent(sorcery) also sac a creature(like a token that is irrelevant anyway) search library for a card, put into hand.
Profane Tutor(sorcery) Suspend 2, 1B for two counters. Remove on at upkeep. When last is gone, search library for a card, put into hand.
Vampiric Tutor(instant)search library for a card, put into hand. You loose 2 life.
Grim Tutor(sorcery) search library for a card, put into hand. You loose 3 life.
Gamble(sorcery) discard a card then search library for a card, put into hand.
Illicit Shipment(sorcery) can be duplicated of desired,
Imperial Seal(sorcery) lose 2 life, search library for a card, put into hand.
!!!! Increasing Ambition(sorcery) search library for a card, put into hand. If cast from graveyard, search library for 2 cards, put into hand.
Insatiable Avarice(sorcery) pay 2 more then search library for a card, put into hand. pay 3 more target player draws 3 cards and loses 3 life.
Johnny Combo Player(creature) pay 4 and tap, search library for a card, put into hand.
Lilian Vess(Planswalker) +1 opponant discard 1. -2 search library for a card, put into hand. -8 put all creatures from all graveyards on battlefield under your control.
Nissa Revane(Planswalker) +1 search for Nissa’s Chosen put onto battlefield. +1 Gain 2 life for each elf you control. -7 Search library for any number of elf creatures and put onto battlefield. Worthwhile to get Nissa’s Chosen as it never really dies.
Razakeths’s Rite(sorcery) search library for a card, put into hand.
Slivers of interest. Picked from Wizards.com’s full list of Slivers and below, Elves.
https://gatherer.wizards.com/search?cardName=Sliver&formatLegalities=Legal%3ACommander&language=eq~English~en-us
Bonescythe, Brood, Cloudshredder, Constricting, Diffusion, Dormant, **Dregscape, Essence, First Sliver’s Chosen, Fury, Ghostflame, Harmonic, Groundshaker, Horned,
Hunter, Lancer, Lavabelly, Leeching, Manaweft, Opaline, Plated, Quick, Quilled, Root, Sentinel, Shadow, Shifting, Gravemother, Hive, HIVELORD, LEGION, Queen, Spiteful, Spitting, Striking, Synapse, Synchronous, SYPHON, Talon, Taunting, Telekinetic, The First, Thorncaster, Toxin, Venom, VIRULENT, Winged.
Notes: a token creature with regenerate, can regenerate itself even though it’s a token, as long as it fulfills the other regenerate rules.
Elves of Interest.
Abomination of Llanowar, Lathril Blade of the Elves, Rhys the Exiled, Joraga Warcaller, Priest of Titania, Elvish Archdruid, Elvish Champion, Timberwatch Elf, Imperious PerfectEVOLUTION SAGE, Dwynen Gilt-Leaf Daen, Elvish Promenade, Leaf-Crowned Visionary, Eladamri Korvecdal,
non-Sliver, non-Elf, misc cards
Craterhoof Behemoth, Finale of Devastation, Genesis Wave, Overwhelming Stampede, Collective Unconscious and Shamanic Revelation, Overrun,
Reaper King(Legendary Creature it’s a Scarecrow that costs a lot. Each scarecrow gets a +1+1, and when one comes into play, destroy target permanent.
The Prismatic Bridge(Legendary enchcantment) lets you play at no cost, a creature or planswalker every upkeep.
Pull from the graveyard.
Return from Extinction, Patriarch’s Bidding
Star of Extinction(only after Indestructable)
Um, this one is questionable. It can have a bunch of duplicates, but if it also becomes a sliver inheriting all other active sliver affects, and an elf, that would just be nice.
Tempest Hawk(creature) it’s only trick is if it damages a player you get to search for another. Even if it dies. It also breaks the “one only” rule to allow any number of them.
*Entomb(instant) search library for a card, put into graveyard.
Everythingamajig(artifact) Proliferate. choose any number of permanents with counters and ad another of a kind already on them. Good for Planswalkers.