Talisman of Dominance

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

Arcane Signet

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

When Inherited Envelope enters, the Ring tempts you.
{T}: Add one mana of any color.

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

{T}: Add one mana of any color that a land an opponent controls could produce.

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

Charcoal Diamond enters tapped.
{T}: Add {B}.

You have no maximum hand size.
{T}: Add {C}.

You have no maximum hand size.
{T}: Add one mana of any color.