mtg black aura cards Untamed Hunger [Oath of the Gatewatch] you may destroy target artifact or enchantment. Aura Shards (#2694) (borderless)

You might also go full equine typal and include a few nice Selesnya horses since Keleth, Sunmane Familiar doesnt have enough colors to include enough horses to form a deck

Legendary Creature - Human Warrior Color tag templates(None) Commander (CTRL to add secondary) Artifact Qty: 13 Price: $215.67 Aetherflux Reservoir Whenever you cast a spell, you gain 1 life for each spell you've cast this turn

5 | Niv-Mizzet, Parun While six-mana Dragons in Magic are rarely serious Commander options, Niv-Mizzet, Parun is the exception

Krenko, Baron of Tin Street Goblins are known for their numbers, and Krenko, Baron of Tin Street gives you a way to produce goblins and put +1/+1 counters on them

Flexible and powerful, I have only once used it to make an opponent draw a card in a game of EDH, but it was on their end step and it made them lose if that piques your curiosity