A simple Ruric Thar list that is also my only Commander deck currently. I work on improving the list constantly.
Game plan: Fast mana, turn 3 or 4 Ruric Thar, slow everyone else down, play big things, smash face. Interestingly, the deck plays a lot like a combo deck since we have very little interaction and are mostly focusing on just building our own board.
The deck also plays excellently with Nikya of the Old Ways as its commander since we only really play 4 noncreature spells and there are no plans to play more than 6, or at most 7.

If the effect of a spell can be found stapled on a creature, this deck will prefer to play the creature, as Ruric Thar, The Unbowed punishes us just as much he punishes our opponents. For the most part, ETB effects are preferred over activated abilities because of the tutors. While giving large buffs to single creatures can be very powerful, this deck prefers protection, card advantage, and buffs for the whole team.
The deck is more of a go wide strategy and its average creatures are usually stronger than your opponents, but be wary that we do have problems with very large creatures since ours rarely are bigger than 6/6.

We are quite good at removing threatening noncreature permanents but against creatures we only really have our own creatures and a few "silver bullets", usually we trust on other people to remove the biggest threats and trusting that we'll be able to build our board faster and better than our opponents.

The deck really starts to work on the 4, 5, and 6 drops (basically, we must hit 6 mana on turn 6, or before), so we need quite a bit of mana, but because of Ruric Thar, we prefer not to play noncreature ramp.
For this reason, the deck will play close to 40 lands (currently 37) and close to 15 (currently 14) ramp creatures. These numbers will require some tweaking, I'm also considering playing a single noncreature ramp spell. I'm guessing that the optimal count is between 45 and 50 ramp cards in total.

Creatures that are "just good" are usually not good enough for this deck, we really prefer all of our creatures to advance our game plan in more ways than just adding a large efficient body to the battlefield.

PLANNED CHANGES

Beneath are a bunch of cards I'm planning to add or remove from the deck categorized in a few different categories.

MANA

• Fire-Lit Thicket
• Grove of the Burnwillows
• Kessig Wolf Run
• Mossfire Valley
• Rootbound Crag
• Bonders' Enclave

UPGRADES/CHANGES

• Blighted Woodland => Castle Garenbrig
• Arbor Colossus => Whiptongue Hydra
• Incubation Druid => Viridian Emissary
• Steel Hellkite => The Great Henge
• Archetype of Aggression => Abundance
• Den Protector => Rites of Flourishing
• Zhur-Taa Ancient => Nyxbloom Ancient
• Garruk's Horde => Vizier of the Menagerie

POSSIBLY OUT

Whenever a card feels bad, I add it here, and whenever it feels bad again I add a dot vote as a + after the name.
This doesn't necessarily mean it felt bad when playing with it, just that I feel that it might not be good for the deck.
Cards with lots of votes are usually more likely to be cut for other cards when I do changes.

• Khenra Charioteer (trample is rarely needed)
• Molder Slug (it seems to rarely be more than a minor nuisance)

IN

• Noncreature:
• Ramp: Boreal Druid
• Card Selection/Advantage: Sylvan Library
• Removal:
• Buff: Angrath's Marauders.
• Good Stuff:

MAYBE

• Noncreature:
• Ramp: Sylvan Ranger, Fertilid, Yavimaya Elder, Regal Behemoth.
• Removal: Gruul Ragebeast, Glorybringer, Drakuseth, Maw of Flames.
• Card Advantage/Selection: Genesis, Primordial Sage, Paleoloth, Greenwarden of Murasa, Humble Defector, Fauna Shaman, Oracle of Mul Daya, Courser of Kruphix, Avaricious Dragon.
• Buff: Prowling Serpopard, Vigor, Stonehoof Chieftain, Archetype of Endurance, Siege Behemoth, Aggressive Mammoth, Sylvan Safekeeper, Pathbreaker Ibex, Questing Beast.
• Good Stuff: Thragtusk, Forgotten Ancient, Savageborn Hydra, Goblin Diplomats.

CONSIDERING

• Noncreature: Tooth and Nail, Shared Summons.
• Ramp: Veteran Explorer.
• Removal: Bearer of the Heavens, Woodfall Primus.
• Card Advantage/Selection: Rishkar's Expertise, Momentous Fall, Green Sun's Zenith.
• Buff: Soul of New Phyrexia, Brawn.
• Good Stuff: Reality Smasher, Nullhide Ferox.

Combos

The deck used to play a couple of infinite combos but they were just not very realistically achievable due to requiring too many cards or mana. Now we just run Kiki-Jiki, Mirror Breaker, and Zealous Conscripts and Great Oak Guardian, two other creatures that make him go infinite and that are otherwise good creatures too.