Mana Confluence

{T}, Pay 1 life: Add one mana of any color.

Arcane Signet

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

This land enters tapped.
When this land enters, sacrifice it unless you pay {1}.
{T}: Add one mana of any color.

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

Lands you control have "{T}: Add one mana of any color."
{T}: Add one mana of any color.

Whenever this land becomes tapped, it deals 1 damage to you.
{T}: Add one mana of any color.

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