Swamp

Gravkill

Dubious Delicacy

Flash
When this artifact enters, up to one target creature gets -3/-3 until end of turn.
{2}, {T}, Sacrifice this artifact: You gain 3 life.
{2}, {T}, Sacrifice this artifact: Target opponent loses 3 life.

Singularity Rupture

Destroy all creatures, then any number of target players each mill half their library, rounded down.

Swarm Culler

Flying
Whenever this creature becomes tapped, you may sacrifice another creature or artifact. If you do, draw a card.

Cryoshatter

Enchant creature
Enchanted creature gets -5/-0.
When enchanted creature becomes tapped or is dealt damage, destroy it.

Gravpack Monoist

Flying
When this creature dies, create a tapped 2/2 colorless Robot artifact creature token.

Illvoi Galeblade

Flash
Flying
{2}, Sacrifice this creature: Draw a card.

Depressurize

Target creature gets -3/-0 until end of turn. Then if that creature's power is 0 or less, destroy it.

Island

Faller's Faithful

When this creature enters, destroy up to one other target creature. If that creature wasn't dealt damage this turn, its controller draws two cards.

Cryogen Relic

When this artifact enters or leaves the battlefield, draw a card.
{1}{U}, Sacrifice this artifact: Put a stun counter on up to one target tapped creature. (If a permanent with a stun counter would become untapped, remove one from it instead.)

Temporal Intervention

Void — This spell costs {2} less to cast if a nonland permanent left the battlefield this turn or a spell was warped this turn.
Target opponent reveals their hand. You choose a nonland card from it. That player discards that card.

Umbral Collar Zealot

Sacrifice another creature or artifact: Surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

Sunset Saboteur

Menace
Ward—Discard a card.
Whenever this creature attacks, put a +1/+1 counter on target creature an opponent controls.

Decode Transmissions

You draw two cards and lose 2 life.
Void — If a nonland permanent left the battlefield this turn or a spell was warped this turn, instead you draw two cards and each opponent loses 2 life.

Alpharael, Dreaming Acolyte

When Alpharael enters, draw two cards. Then discard two cards unless you discard an artifact card.
During your turn, Alpharael has deathtouch.

Divert Disaster

Counter target spell unless its controller pays {2}. If they do, you create a Lander token. (It's an artifact with "{2}, {T}, Sacrifice this token: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.")

Hullcarver

Secluded Starforge

{T}: Add {C}.
{2}, {T}, Tap X untapped artifacts you control: Target creature gets +X/+0 until end of turn. Activate only as a sorcery.
{5}, {T}: Create a 2/2 colorless Robot artifact creature token.

Unravel

Counter target spell. If the amount of mana spent to cast that spell was less than its mana value, you draw a card.