Lost Jitte

Legendary Artifact — Equipment

Whenever equipped creature deals combat damage, put a charge counter on Lost Jitte.
Remove a charge counter from Lost Jitte: Choose one —
• Untap target land.
• Target creature can't block this turn.
• Put a +1/+1 counter on equipped creature.
Equip

Manifold Key

Artifact

, : Untap another target artifact.
, : Target creature can't be blocked this turn.

Masterwork of Ingenuity

Artifact — Equipment

You may have Masterwork of Ingenuity enter the battlefield as a copy of any Equipment on the battlefield.

Meekstone

Artifact

Creatures with power 3 or greater don't untap during their controllers' untap steps.

Merchant's Dockhand

Artifact Creature — Construct (1/2)

, , Tap X untapped artifacts you control: Look at the top X cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order.

Metallic Sliver

Artifact Creature — Sliver (1/1)

Multiclass Baldric

Artifact — Equipment

Equipped creature has lifelink if you control a Cleric, deathtouch if you control a Rogue, haste if you control a Warrior, and flying if you control a Wizard.
As long as you have a full party, prevent all damage that would be dealt to equipped creature.
Equip

Myr Mindservant

Artifact Creature — Myr (1/1)

, : Shuffle your library.

Myr Servitor

Artifact Creature — Myr (1/1)

At the beginning of your upkeep, if Myr Servitor is on the battlefield, each player returns all cards named Myr Servitor from their graveyard to the battlefield.

Neglected Heirloom // Ashmouth Blade

Artifact — Equipment // Artifact — Equipment

Equipped creature gets +1/+1.
When equipped creature transforms, transform Neglected Heirloom.
Equip

Ashmouth Blade

Equipped creature gets +3/+3 and has first strike.
Equip

Neurok Hoversail

Artifact — Equipment

Equipped creature has flying.
Equip (: Attach to target creature you control. Equip only as a sorcery. This card enters the battlefield unattached and stays on the battlefield if the creature leaves.)

O-Naginata

Artifact — Equipment

O-Naginata can be attached only to a creature with power 3 or greater.
Equipped creature gets +3/+0 and has trample.
Equip (: Attach to target creature you control. Equip only as a sorcery.)

Obelisk of Undoing

Artifact

, : Return target permanent you both own and control to your hand.

Pacification Array

Artifact

, : Tap target artifact or creature.

Pathway Arrows

Artifact — Equipment

Equipped creature has ", : This creature deals 1 damage to target creature. If a colorless creature is dealt damage this way, tap it."
Equip

Peregrine Mask

Artifact — Equipment

Equipped creature has defender, flying, and first strike.
Equip

Pithing Needle

Artifact

As Pithing Needle enters the battlefield, choose a card name.
Activated abilities of sources with the chosen name can't be activated unless they're mana abilities.

Prism Ring

Artifact

As Prism Ring enters the battlefield, choose a color.
Whenever you cast a spell of the chosen color, you gain 1 life.

Profane Memento

Artifact

Whenever a creature card is put into an opponent's graveyard from anywhere, you gain 1 life.

Proper Laboratory Attire

Artifact — Equipment

Equipped creature gets +2/+1 and has protection from die rolls. (Nothing that lets a player roll a die can block, target, deal damage to, or attach to equipped creature.)
Equip