Mind Stone

{T}: Add {C}.
{1}, {T}, Sacrifice Mind Stone: Draw a card.

Myr Retriever

When Myr Retriever dies, return another target artifact card from your graveyard to your hand.

When Workshop Assistant dies, return another target artifact card from your graveyard to your hand.

{2}, {T}, Sacrifice Wayfarer's Bauble: Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Artifact spells you cast cost {1} less to cast.

Whenever Dross Scorpion or another artifact creature dies, you may untap target artifact.

{T}: Add one mana of any color in your commander's color identity.

Sacrifice Bottle Gnomes: You gain 3 life.