Aftershock

Destroy target artifact, creature, or land. Aftershock deals 3 damage to you.

Smoldering Efreet

When Smoldering Efreet dies, it deals 2 damage to you.

Loxodon Warhammer

Equipped creature gets +3/+0 and has trample and lifelink.
Equip {3}

Sarkhan's Rage

Sarkhan's Rage deals 5 damage to any target. If you control no Dragons, Sarkhan's Rage deals 2 damage to you.

Goblin Psychopath

Whenever Goblin Psychopath attacks or blocks, flip a coin. If you lose the flip, the next time it would deal combat damage this turn, it deals that damage to you instead.

Coalhauler Swine

Whenever Coalhauler Swine is dealt damage, it deals that much damage to each player.

Auntie Blyte, Bad Influence

Flying
Whenever a source you control deals damage to you, put that many +1/+1 counters on Auntie Blyte, Bad Influence.
{1}{R}, {T}, Remove X +1/+1 counters from Auntie Blyte: It deals X damage to any target.

Thriving Bluff

Thriving Bluff enters tapped. As it enters, choose a color other than red.
{T}: Add {R} or one mana of the chosen color.

Spear Spewer

Defender
{T}: Spear Spewer deals 1 damage to each player.

Impending Doom

Enchant creature
Enchanted creature gets +3/+3 and attacks each combat if able.
When enchanted creature dies, Impending Doom deals 3 damage to that creature's controller.

Ravenous Giant

At the beginning of your upkeep, this creature deals 1 damage to you.

Goblin Artillery

{T}: Goblin Artillery deals 2 damage to any target and 3 damage to you.

Mountain

Fireslinger

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