Serpent Generator

, : Create a 1/1 colorless Snake artifact creature token. It has “Whenever this creature deals damage to a player, that player gets a poison counter.” (A player with ten or more poison counters loses the game.)

Ashnod’s Transmogrant

, Sacrifice Ashnod’s Transmogrant: Put a +1/+1 counter on target nonartifact creature. That creature becomes an artifact in addition to its other types.

Heal

Prevent the next 1 damage that would be dealt to any target this turn.
Draw a card at the beginning of the next turn’s upkeep.

Naked Singularity

Cumulative upkeep (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 , Islands produce , Swamps produce , Mountains produce , and Forests produce instead of any other type.

Stench of Evil

Destroy all Plains. For each land destroyed this way, Stench of Evil deals 1 damage to that land’s controller unless they pay .

Thoughtleech

Whenever an Island an opponent controls becomes tapped, you may gain 1 life.

Freyalise’s Winds

Whenever a permanent becomes tapped, put a wind counter on it.
If a permanent with a wind counter on it would untap during its controller’s untap step, remove all wind counters from it instead.

Nacre Talisman

Whenever a player casts a white spell, you may pay . If you do, untap target permanent.

Force Void

Counter target spell unless its controller pays .
Draw a card at the beginning of the next turn’s upkeep.

Polar Kraken

Trample
Polar Kraken enters the battlefield tapped.
Cumulative upkeep—Sacrifice a land. (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.)

Balduvian Conjurer

: Target snow land becomes a 2/2 creature until end of turn. It’s still a land.

Necropotence

Skip your draw step.
Whenever you discard a card, exile that card from your graveyard.
Pay 1 life: Exile the top card of your library face down. Put that card into your hand at the beginning of your next end step.

Glaciers

At the beginning of your upkeep, sacrifice Glaciers unless you pay .
All Mountains are Plains.

Mind Ravel

Target player discards a card.
Draw a card at the beginning of the next turn’s upkeep.

Nevinyrral’s Disk

Nevinyrral’s Disk enters the battlefield tapped.
, : Destroy all artifacts, creatures, and enchantments.

Circle of Protection: Red

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

Winter Orb

As long as Winter Orb is untapped, players can’t untap more than one land during their untap steps.

Red Mana Battery

, : Put a charge counter on Red Mana Battery.
, Remove any number of charge counters from Red Mana Battery: Add , then add an additional for each charge counter removed this way.

Aladdin’s Lamp

, : The next time you would draw a card this turn, instead look at the top X cards of your library, put all but one of them on the bottom of your library in a random order, then draw a card. X can’t be 0.

Winter Orb

As long as Winter Orb is untapped, players can’t untap more than one land during their untap steps.

Rebirth

Remove Rebirth from your deck before playing if you’re not playing for ante.
Each player may ante the top card of their library. If a player does, that player’s life total becomes 20.

Mind Bomb

Each player may discard up to three cards. Mind Bomb deals damage to each player equal to 3 minus the number of cards they discarded this way.