Coldsteel Heart

As this artifact enters, choose a color.

: Add one mana of the chosen color.

This artifact enters tapped.

: Choose a color of a card in your graveyard. Add one mana of that color.

As this artifact enters, choose a color.

Creatures you control of the chosen color get +1/+0.

: Add one mana of the chosen color.

As this artifact enters, choose a creature type.

: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type.

As this artifact enters, choose a creature type.

Creatures you control of the chosen type get +1/+1.

: Add one mana of any color.

When this artifact enters, draw a card.

, : Add one mana of any color.