Swamp

Cyclopean Mummy

Murk Dwellers

Whenever Murk Dwellers attacks and isn't blocked, it gets +2/+0 until end of combat.

Headless Horseman

All Hallow's Eve

Exile All Hallow's Eve with two scream counters on it.
At the beginning of your upkeep, if All Hallow's Eve is exiled with a scream counter on it, remove a scream counter from it. If there are no more scream counters on it, put it into your graveyard and each player returns all creature cards from their graveyard to the battlefield.

Greed

Mana Clash

You and target opponent each flip a coin. Mana Clash deals 1 damage to each player whose coin comes up tails. Repeat this process until both players' coins come up heads on the same flip.

Wheel of Fortune

Each player discards their hand, then draws seven cards.

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Disintegrate

Disintegrate deals X damage to any target. If it's a creature, it can't be regenerated this turn, and if it would die this turn, exile it instead.

Sinkhole

Glasses of Urza

Sol Ring

Mountain

Ashes to Ashes

Exile two target nonartifact creatures. Ashes to Ashes deals 5 damage to you.

Bad Moon

Demonic Tutor

Search your library for a card, put that card into your hand, then shuffle.

Zombie Master

Other Zombie creatures have swampwalk. (They can't be blocked as long as defending player controls a Swamp.)
Other Zombies have "{B}: Regenerate this permanent."

Mox Sapphire

Fellwar Stone

{T}: Add one mana of any color that a land an opponent controls could produce.

Copper Tablet

At the beginning of each player's upkeep, Copper Tablet deals 1 damage to that player.

Strip Mine

{T}: Add {C}.
{T}, Sacrifice Strip Mine: Destroy target land.

Nevinyrral's Disk

Nevinyrral's Disk enters tapped.
{1}, {T}: Destroy all artifacts, creatures, and enchantments.

Mox Emerald

Walking Dead

Dark Ritual

Howling Mine

At the beginning of each player's draw step, if Howling Mine is untapped, that player draws an additional card.

Chain Lightning

Chain Lightning deals 3 damage to any target. Then that player or that permanent's controller may pay {R}{R}. If the player does, they may copy this spell and may choose a new target for that copy.

Evil Presence

City of Brass

Whenever City of Brass becomes tapped, it deals 1 damage to you.
{T}: Add one mana of any color.