Whenever a Boar enters the battlefield or attacks, draw a card or return an Egg from your graveyard to your hand.
Whenever an Egg enters the battlefield, you may sacrifice it. If you do, Sam I am deals 5 damage to each opponent.
0/2 “I do so like Green Eggs and Ham. Thank you, thank you, Sam-I-Am.”
Next - A commander that steals (permanently or temporarily) non-creature permanents.
Koya-San, Shenyen Master2W
Legendary Creature - Human Monk
Prowess XU: Each player puts the top X cards of their library into their graveyard. XR: Exile target instant or sorcery card in your graveyard with converted mana cost X or less. Copy that card and play the copy without paying its mana cost.
Next - Creates tokens under another players' control and/or causes you to get tokens for other players doing things.
Aemon Targaryen, the Dragon Knight1WB
Legendary Creature - Human Knight
Eminence - Whenever you cast a Knight spell, if Aemon Targaryen is on the battlefield or in the Command zone, choose a color. Create an emblem with “Your devotion to the chosen color is increased by one.”
Whenever a Knight enters the battlefield, gain life equal to your devotion to white.
Whenever a Knight dies, each opponent loses life equal to your devotion to black.
Feyomsi, Necromancer of UkudUBG
Legendary Creature - Cat Demon Wizard
Imprint - When Feyomsi enters the battlefield, exile any number of cards in your graveyard. XUB: Play an instant or sorcery exiled with Feyomsi with converted mana cost X or less without paying its mana cost. XBG: Play a creature exiled with Feyomsi with converted mana cost X or less without paying its mana cost. UG: Play a land exiled with Feyomsi.
2/3 "Death and renewal are the natural order of things. We just help speed up the process."
Next - Someone worthy of leading an army in the Jeskai Way.
Legendary Creature - Human Warrior
At the beginning of your upkeep, if your devotion to blue is five or more gain control of target non-land permanent, and if your devotion to black is five or more each opponent loses four life, and if your devotion to red is five or more deal four damage to target creature you don’t control.
Next - a Commander that is at least one color but has activated abilities that have in its cost.
Thor, God of Thunder3WR
Legendary Snow Creature - God
Thor's power and toughness are equal to the number of Snow Permanents you control. 2RW: Thor deals 3 damage to any target. Gain 3 life. 5RW, sacrifice Thor: Discard your hand and draw cards equal to the number of snow permanents you control.
Next - An Odin, Loki, Freyja, Sif, Heimdall, or other character from Norse mythology
Ashe Remicah, Temporal ConjurorWBRG
Legendary Creature - Human Wizard
Ashe Remicah cannot attack
Exile an artifact, creature, enchantment, and land you control: Take an additional turn.
0/4 When one wants to create time, you have to be willing to sacrifice everything else.
Next - A Commander that spreads a plague or a virus to other creatures or permanents
Zedruu the Meanspirited1UBR
Legendary Creature - Minotaur Rogue
At the beginning of your upkeep, each opponent loses X life and you draw X cards where X is the number of permanents your opponents own that you control. UBR: Exchange control of target nonland permanent you control and target permanent an opponent controls that shares a card type with it.
Legendary Creature - Human Warrior
When Haveron Tamar enters the battlefield, create a colorless 1/1 Sand Warrior creature token for each Forest you control, a +1/+1 counter on each Warrior you control for each Plains you control, and deals 1 damage to each opponent for each Mountain you control.
Next - a Commander that rewards you for having lots of creatures with a particular (and preferably obscure) keyword. Think Stonebrow, Krosan Hero for something like Flanking or Fading.
Liliana Vess, Benalish Healer1WW
Planeswalker - Liliana
[+2]: Gain 4 life and exile up to one target creature in any graveyard.
[-3]: Exile target black permanent
[-4]: You get an Emblem with "Prevent all damage dealt to Humans you control."
Next - A Commander that has triggers when you Cycle or discard a card, making you want to run multiple cycling cards and payoffs like Lightning Rift and/or Drake Haven.
Aragog, Acromantula Broodfather2BG
Legendary Creature - Spider
Reach 1BG: Create a 0/2 Green Spider token creature with Reach. 2BG: Creatures you control deal combat damage equal to their toughness until end of turn.
Next - a Commander that cares about even converted mana costs (as opposed to Yennet, Cryptic Sovereign that cared about odd).
Legendary Creature - Hound
When Forgotten One enters the battlefield, exile each Cat. Forgotten One deals damage equal to those cats' total converted mana cost to those cats' controllers.
Forgotten One's power and toughness are each equal to the number of Hounds on the battlefield.
Other Hounds you control get +X/+X where X is Forgotten One's power.
*/* I really don't like cats.
Bespar, the Woodstalker1GR
Legendary Creature - Bear Druid
Trample, Thrash (Whenever this creature deals damage to a player, it deals that much damage plus 1 instead)
Other Bears you control get +1/+1 and gain Trample and Thrash.
Next - A commander that has the ability of your favorite Instant/Sorcery (similar to the 'Magus if the X' creatures).
Ailaak, Temple Mistress2UBR
Legendary Creature - Angel
Whenever a white creature enters the battlefield, each opponent loses one life.
As long as you control a Cleric, Ailaak gets +2/+2 and gains Deathtouch.
Partner with Clerics (You can have two Commanders as long as the other one is a Cleric)
Next - A Commander that steals lands, but gives them back at end of turn.