Furnace of Rath [Tempest]Set: Tempest Type: Enchantment Rarity: Rare Cost: {1}{R}{R}{R} If a source would deal damage to a permanent or player, it deals double that damage to that permanent or player instead.

(They can't be the targets of spells or abilities

Set: Mirage Type: Artifact Rarity: Rare Cost: {0} Discard your hand

Set: Portal Three Kingdoms Type: Legendary Creature — Human Soldier Rarity: Rare Cost: {3}{U}{U} Horsemanship (This creature can't be blocked except by creatures with horsemanship

attach it to a creature you control

During each of your turns

Set: Friday Night Magic 2009 Type: Artifact — Equipment Rarity: Rare Cost: {2} Equipped creature has haste and shroud

you lose the game

Set: Kaladesh Prerelease Promos Type: Enchantment Rarity: Rare Cost: {W} Creatures your opponents control enter the battlefield tapped

it deals 7 damage to you

Might Type: Artifact Rarity: Rare Cost: {5} Each creature gets +1/+1 for each other creature on the battlefield that shares at least one creature type with it

Set: Commander Anthology Type: Creature — Beast Rarity: Rare Cost: {5}{G}{G} Hexproof

At the beginning of the upkeep of enchanted enchantment's controller