Arcane Signet

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

Jeweled Lotus

{T}, Sacrifice Jeweled Lotus: Add three mana of any one color. Spend this mana only to cast your commander.

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

At the beginning of your upkeep, flip a coin. If you lose the flip, Mana Crypt deals 3 damage to you.
{T}: Add {C}{C}.

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

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