Angel's Trumpet

All creatures have vigilance.
At the beginning of each player's end step, tap all untapped creatures that player controls that didn't attack this turn. This artifact deals damage to the player equal to the number of creatures tapped this way.

Soul Conduit

{6}, {T}: Two target players exchange life totals.

Dingus Staff

Whenever a creature dies, this artifact deals 2 damage to that creature's controller.

Nomad Stadium

{T}: Add {W}. This land deals 1 damage to you.
Threshold — {W}, {T}, Sacrifice this land: You gain 4 life. Activate only if seven or more cards are in your graveyard.

Mirror Entity

Changeling (This card is every creature type.)
{X}: Until end of turn, creatures you control have base power and toughness X/X and gain all creature types.

Blasting Station

{T}, Sacrifice a creature: This artifact deals 1 damage to any target.
Whenever a creature enters, you may untap this artifact.

Darien, King of Kjeldor

Whenever you're dealt damage, you may create that many 1/1 white Soldier creature tokens.

Torture Chamber

At the beginning of your upkeep, put a pain counter on this artifact.
At the beginning of your end step, this artifact deals damage to you equal to the number of pain counters on it.
{1}, {T}, Remove all pain counters from this artifact: It deals damage to target creature equal to the number of pain counters removed this way.