Icy Manipulator

{1}, {T}: Tap target artifact, creature, or land.

Iron Myr

Isochron Scepter

Imprint — When this artifact enters, you may exile an instant card with mana value 2 or less from your hand.
{2}, {T}: You may copy the exiled card. If you do, you may cast the copy without paying its mana cost.

Jinxed Choker

At the beginning of your end step, target opponent gains control of this artifact and puts a charge counter on it.
At the beginning of your upkeep, this artifact deals damage to you equal to the number of charge counters on it.
{3}: Put a charge counter on this artifact or remove one from it.

Rule of Law

Each player can't cast more than one spell each turn.

Krark's Thumb

If you would flip a coin, instead flip two coins and ignore one.

Leaden Myr

Leonin Bladetrap

Flash (You may cast this spell any time you could cast an instant.)
{2}, Sacrifice this artifact: It deals 2 damage to each attacking creature without flying.

Leonin Scimitar

Equipped creature gets +1/+1.
Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)

Leonin Sun Standard

{1}{W}: Creatures you control get +1/+1 until end of turn.

Leveler

When this creature enters, exile all cards from your library.

Liar's Pendulum

{2}, {T}: Choose a card name. Target opponent guesses whether a card with that name is in your hand. You may reveal your hand. If you do and your opponent guessed wrong, draw a card.

Lifespark Spellbomb

{G}, Sacrifice this artifact: Until end of turn, target land becomes a 3/3 creature that's still a land.
{1}, Sacrifice this artifact: Draw a card.

Elemental

Lightning Coils

Whenever a nontoken creature you control dies, put a charge counter on this artifact.
At the beginning of your upkeep, if this artifact has five or more charge counters on it, remove all of them from it and create that many 3/1 red Elemental creature tokens with haste. Exile them at the beginning of the next end step.

Lightning Greaves

Equipped creature has haste and shroud. (It can't be the target of spells or abilities.)
Equip {0}

Arrest

Enchant creature
Enchanted creature can't attack or block, and its activated abilities can't be activated.

Mirrodin