Masticore

At the beginning of your upkeep, sacrifice this creature unless you discard a card.
{2}: This creature deals 1 damage to target creature.
{2}: Regenerate this creature.

Jackal Pup

Whenever this creature is dealt damage, it deals that much damage to you.

Mountain

Shattering Pulse

Buyback {3} (You may pay an additional {3} as you cast this spell. If you do, put this card into your hand as it resolves.)
Destroy target artifact.

Arc Lightning

Arc Lightning deals 3 damage divided as you choose among one, two, or three targets.

Fireslinger

{T}: This creature deals 1 damage to any target and 1 damage to you.

Mogg Fanatic

Sacrifice this creature: It deals 1 damage to any target.

Avalanche Riders

Haste
Echo {3}{R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When this creature enters, destroy target land.

Ghitu Encampment

This land enters tapped.
{T}: Add {R}.
{1}{R}: This land becomes a 2/1 red Warrior creature with first strike until end of turn. It's still a land. (It deals combat damage before creatures without first strike.)

Scald

Whenever a player taps an Island for mana, this enchantment deals 1 damage to that player.

Wasteland

{T}: Add {C}.
{T}, Sacrifice this land: Destroy target nonbasic land.

Stone Rain

Flowstone Flood

Buyback—Pay 3 life, Discard a card at random. (You may pay 3 life and discard a card at random in addition to any other costs as you cast this spell. If you do, put this card into your hand as it resolves.)
Destroy target land.

Hammer of Bogardan

Hammer of Bogardan deals 3 damage to any target.
{2}{R}{R}{R}: Return this card from your graveyard to your hand. Activate only during your upkeep.

Cursed Scroll

{3}, {T}: Choose a card name, then reveal a card at random from your hand. If that card has the chosen name, Cursed Scroll deals 2 damage to any target.

Ancient Tomb

{T}: Add {C}{C}. This land deals 2 damage to you.

Thran Foundry

{1}, {T}, Exile this artifact: Target player shuffles their graveyard into their library.