Cathodion

Chromatic Star

{1}, {T}, Sacrifice Chromatic Star: Add one mana of any color.
When Chromatic Star is put into a graveyard from the battlefield, draw a card.

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

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

When Ichor Wellspring enters or is put into a graveyard from the battlefield, draw a card.

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