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.

Onyx Talisman

Whenever a player casts a black spell, you may pay {3}. If you do, untap target permanent.

Pentagram of the Ages

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

Pit Trap

{2}, {T}, Sacrifice this artifact: Destroy target attacking creature without flying. It can't be regenerated.

Runed Arch

This artifact enters tapped.
{X}, {T}, Sacrifice this artifact: X target creatures with power 2 or less can't be blocked this turn.

Shield of the Ages

{2}: Prevent the next 1 damage that would be dealt to you this turn.

Skull Catapult

{1}, {T}, Sacrifice a creature: This artifact deals 2 damage to any target.

Snow Fortress

Defender (This creature can't attack.)
{1}: This creature gets +1/+0 until end of turn.
{1}: This creature gets +0/+1 until end of turn.
{3}: This creature deals 1 damage to target creature without flying that's attacking you.

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.

Soldevi Simulacrum

Cumulative upkeep {1} (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.)
{1}: This creature gets +1/+0 until end of turn.

Kjeldoran Elite Guard

{T}: Target creature gets +2/+2 until end of turn. When that creature leaves the battlefield this turn, sacrifice this creature. Activate only during combat.

Staff of the Ages

Creatures with landwalk abilities can be blocked as though they didn't have those abilities.

Sunstone

{2}, Sacrifice a snow land: Prevent all combat damage that would be dealt this turn.

Time Bomb

At the beginning of your upkeep, put a time counter on this artifact.
{1}, {T}, Sacrifice this artifact: This artifact deals damage equal to the number of time counters on it to each creature and each player.

Urza's Bauble

{T}, Sacrifice this artifact: Look at a card at random in target player's hand. You draw a card at the beginning of the next turn's upkeep.

Vexing Arcanix

{3}, {T}: Target player chooses a card name, then reveals the top card of their library. If that card has the chosen name, that player puts it into their hand. Otherwise, they put it into their graveyard and this artifact deals 2 damage to them.

Ice Age