Aether Meltdown | Enchantment | Aura | Flash (You may cast this spell any time you could cast an instant.)
Enchant creature or Vehicle
When Aether Meltdown enters the battlefield, you get {E}{E} (two energy counters).
Enchanted creature gets -4/-0. | Jason Felix
Era of Innovation | Enchantment | | Whenever an artifact or Artificer enters the battlefield under your control, you may pay {1}. If you do, you get {E}{E} (two energy counters).
Pay {E}{E}{E}{E}{E}{E}, Sacrifice Era of Innovation: Draw three cards. | Jason Rainville
Underhanded Designs | Enchantment | | Whenever an artifact enters the battlefield under your control, you may pay {1}. If you do, each opponent loses 1 life and you gain 1 life.
{1}{B}, Sacrifice Underhanded Designs: Destroy target creature. Activate only if you control two or more artifacts. | Anastasia Ovchinnikova
Giant Spectacle | Enchantment | Aura | Enchant creature
Enchanted creature gets +2/+1 and has menace. | Johann Bodin
Durable Handicraft | Enchantment | | Whenever a creature enters the battlefield under your control, you may pay {1}. If you do, put a +1/+1 counter on that creature.
{5}{G}, Sacrifice Durable Handicraft: Put a +1/+1 counter on each creature you control. | Raoul Vitale