Goblin Boom Keg | Artifact | | At the beginning of your upkeep, sacrifice Goblin Boom Keg.
When Goblin Boom Keg is put into a graveyard from the battlefield, it deals 3 damage to any target. | Viktor Titov
Hero's Blade | Artifact | Equipment | Equipped creature gets +3/+2.
Whenever a legendary creature enters the battlefield under your control, you may attach Hero's Blade to it.
Equip {4} ({4}: Attach to target creature you control. Equip only as a sorcery.) | Aaron Miller
Hewed Stone Retainers | Artifact Creature | Golem | Cast this spell only if you've cast another spell this turn. | David Seguin
Pilgrim of the Fires | Artifact Creature | Golem | First strike, trample | Izzy
Scroll of the Masters | Artifact | | Whenever you cast a noncreature spell, put a lore counter on Scroll of the Masters.
{3}, {T}: Target creature you control gets +1/+1 until end of turn for each lore counter on Scroll of the Masters. | Lake Hurwitz
Ugin's Construct | Artifact Creature | Construct | When Ugin's Construct enters the battlefield, sacrifice a permanent that's one or more colors. | Peter Mohrbacher