Arcane Signet

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

Sol Ring

Exile target permanent with mana value 4 or greater.

{T}: Add {W} or {B}.
{W}{B}, {T}, Sacrifice Orzhov Cluestone: Draw a card.

Target creature that dealt damage this turn gets -5/-5 until end of turn.

Target opponent reveals their hand. You choose a nonland card from it and exile that card.

This land enters tapped.
{T}: Add {W} or {B}.

As an additional cost to cast this spell, pay 5 life or sacrifice a creature or enchantment.
Destroy target creature.

Enchant creature
Enchanted creature gets +1/+1 and has flying and lifelink.

Orzhov Basilica enters tapped.
When Orzhov Basilica enters, return a land you control to its owner's hand.
{T}: Add {W}{B}.

Forsaken Sanctuary enters tapped.
{T}: Add {W} or {B}.

This land enters tapped.
When this land enters, you gain 1 life.
{T}: Add {W} or {B}.