Jason Smith

When weeds tumble against the wind, *run*.

Tumbleweed Rising

Create an X/X green Elemental creature token, where X is the greatest power among creatures you control.
Plot {2}{G} (You may pay {2}{G} and exile this card from your hand. Cast it as a sorcery on a later turn without paying its mana cost. Plot only as a sorcery.)

Command Chair

This artifact enters tapped.
{T}: Add three mana of any one color.
{T}: Add X mana of any one color, where X is the greatest mana value among commanders you control.

The trusty disruptor pistol not only dissolves matter, but it's heavy enough to serve as a cudgel.

Disruptor Pistol

{4}, {T}, Sacrifice this artifact: It deals 5 damage to target creature.

"A weapon without a warrior is just a useless hunk of metal."
—Ronin, Clint Barton

Hero's Blade

Equipped creature gets +3/+2.
Whenever a legendary creature you control enters, you may attach this Equipment to it.
Equip {4} ({4}: Attach to target creature you control. Equip only as a sorcery.)

Grim Reaper's Scythe

Whenever one or more creature cards leave your graveyard, create a 2/2 black Zombie creature token.
{3}{B}, {T}, Sacrifice two creatures: Return target creature card from your graveyard to the battlefield with a finality counter on it. Activate only as a sorcery. (If a creature with a finality counter on it would die, exile it instead.)

"With but a wave of my hand I shall destroy you forever!"
—Doctor Doom

Dark Deed

Target creature gets -4/-4 until end of turn.

"How can the public be sure there wasn't any pineapple on there as well?"
—J. Jonah Jameson

Daily Bugle Newspaper

{2}, {T}: Draw a card, then discard a card. Create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")

"The new ID cards are amazing! Instant communication with any Avenger worldwide, top level security clearance in over a hundred countries, and ten percent off at the cafe downstairs!" -She-Hulk, Jennifer Walters

Arcane Signet

{T}: Add one mana of any color in your commander's color identity.