
Crackdown Construct | Artifact Creature | Construct | Whenever you activate an ability of an artifact or creature that isn't a mana ability, Crackdown Construct gets +1/+1 until end of turn. | Johannes Voss

Darksteel Ingot | Artifact | | Indestructible (Effects that say "destroy" don't destroy this artifact.)
{T}: Add one mana of any color. | Martina Pilcerova

Gate Colossus | Artifact Creature | Construct | This spell costs {1} less to cast for each Gate you control.
This creature can't be blocked by creatures with power 2 or less.
Whenever a Gate you control enters, you may put this card from your graveyard on top of your library. | Izzy

Halo Scarab | Artifact Creature | Insect | {2}, Exile Halo Scarab from your graveyard: Create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.") | Khurrum

Pilgrim's Eye | Artifact Creature | Thopter | Flying
When Pilgrim's Eye enters, you may search your library for a basic land card, reveal it, put it into your hand, then shuffle. | Dan Murayama Scott

The Chain Veil | Legendary Artifact | | At the beginning of your end step, if you didn't activate a loyalty ability of a planeswalker this turn, you lose 2 life.
{4}, {T}: For each planeswalker you control, you may activate one of its loyalty abilities once this turn as though none of its loyalty abilities have been activated this turn. | Volkan Baǵa