Howling Mine

At the beginning of each player's draw step, if this artifact is untapped, that player draws an additional card.

Winter Orb

As long as this artifact is untapped, players can't untap more than one land during their untap steps.

Voltaic Key

Icy Manipulator

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

Tangle Wire

Fading 4 (This artifact enters with four fade counters on it. At the beginning of your upkeep, remove a fade counter from it. If you can't, sacrifice it.)
At the beginning of each player's upkeep, that player taps an untapped artifact, creature, or land they control for each fade counter on this artifact.

Phyrexian Processor

As this artifact enters, pay any amount of life.
{4}, {T}: Create an X/X black Phyrexian Minion creature token, where X is the life paid as this artifact entered.