Worn Powerstone

Artifact

Worn Powerstone enters the battlefield tapped.

: Add to your mana pool.

Worry Beads

Artifact

At the beginning of each player's upkeep, that player puts the top card of his or her library into his or her graveyard.

Wurm's Tooth

Artifact

Whenever a player casts a green spell, you may gain 1 life.

Jevna Nor lugged it around, bragging of his triumph over the wurm. Luckily, the tavern regulars didn't notice it was only a baby tooth.

Wurmcoil Engine

Artifact Creature - Wurm

Deathtouch, lifelink

When Wurmcoil Engine dies, put a 3/3 colorless Wurm artifact creature token with deathtouch and a 3/3 colorless Wurm artifact creature token with lifelink onto the battlefield.

Xanthic Statue

Artifact

: Until end of turn, Xanthic Statue becomes an 8/8 Golem artifact creature with trample.

"Until you have lived as a statue, do not talk to me of pigeons."
-Karn, silver golem

Yotian Soldier

Artifact Creature - Soldier

Vigilance

After Kroog was destroyed while most of its defenders were at his side, Urza vowed that none of his allies would ever need to fear for their own defense again, even while laying siege to a city far from their homes.

Zelyon Sword

Artifact

You may choose not to untap Zelyon Sword during your untap step.

, : Target creature gets +2/+0 for as long as Zelyon Sword remains tapped.

No sheath shall hold what finds its home in flesh.

Zuran Orb

Artifact

Sacrifice a land: You gain 2 life.

"I will go to any length to achieve my goal. Eternal life is worth any sacrifice."
-Zur the Enchanter