Mana Vault

This artifact doesn't untap during your untap step.
At the beginning of your upkeep, you may pay {4}. If you do, untap this artifact.
At the beginning of your draw step, if this artifact is tapped, it deals 1 damage to you.
{T}: Add {C}{C}{C}.

Mightstone

Naked Singularity

Cumulative upkeep {3} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
If tapped for mana, Plains produce {R}, Islands produce {G}, Swamps produce {W}, Mountains produce {U}, and Forests produce {B} instead of any other type.

Obelisk of Undoing

{6}, {T}: Return target permanent you both own and control to your hand.

Obsianus Golem

Onulet

When this creature dies, you gain 2 life.

Personal Incarnation

{0}: The next 1 damage that would be dealt to this creature this turn is dealt to its owner instead. Only this creatures owner may activate this ability.
When this creature dies, its owner loses half their life, rounded up.

Pentagram of the Ages

{4}, {T}: The next time a source of your choice would deal damage to you this turn, prevent that damage.

Planar Gate

Creature spells you cast cost {2} less to cast.

Primal Clay

As this creature enters, it becomes your choice of a 3/3 artifact creature, a 2/2 artifact creature with flying, or a 1/6 Wall artifact creature with defender in addition to its other types. (A creature with defender can't attack.)

Rakalite

{2}: Prevent the next 1 damage that would be dealt to any target this turn. Return this artifact to its owner's hand at the beginning of the next end step.

Ring of Renewal

{5}, {T}: Discard a card at random, then draw two cards.

Scarecrow

{6}, {T}: Prevent all damage that would be dealt to you this turn by creatures with flying.

Shapeshifter

As this creature enters, choose a number between 0 and 7.
At the beginning of your upkeep, you may choose a number between 0 and 7.
Shapeshifter's power is equal to the last chosen number and its toughness is equal to 7 minus that number.

Sol Ring

Soldevi Golem

This creature doesn't untap during your untap step.
At the beginning of your upkeep, you may untap target tapped creature an opponent controls. If you do, untap this creature.

Masters Edition IV