Silver Myr

Arcane Signet

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

{T}, Tap an untapped creature you control: Add one mana of any color.

Silverbluff Bridge enters tapped.
Indestructible
{T}: Add {U} or {R}.

{T}: Add one mana of any color in your commander's color identity.
Sacrifice Commander's Sphere: Draw a card.

Fire Diamond enters tapped.
{T}: Add {R}.

{T}: Add {C}.
{T}: Add {U} or {R}. Talisman of Creativity deals 1 damage to you.

Equipped creature has "{T}: Add one mana of any color."
Equip {1}

Coldsteel Heart enters tapped.
As Coldsteel Heart enters, choose a color.
{T}: Add one mana of the chosen color.

Astral Cornucopia enters with X charge counters on it.
{T}: Choose a color. Add one mana of that color for each charge counter on Astral Cornucopia.

Whenever you cast a historic spell, draw a card. (Artifacts, legendaries, and Sagas are historic.)