Nightscape Familiar

Blue spells and red spells you cast cost {1} less to cast.
{1}{B}: Regenerate this creature.

Rakdos Signet

Fire Diamond

This artifact enters tapped.
{T}: Add {R}.

Charcoal Diamond

This artifact enters tapped.
{T}: Add {B}.

Nicol Bolas

Flying
At the beginning of your upkeep, sacrifice Nicol Bolas unless you pay {U}{B}{R}.
Whenever Nicol Bolas deals damage to an opponent, that player discards their hand.

Arcane Signet

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

Dimir Signet

Izzet Signet

Sky Diamond

This artifact enters tapped.
{T}: Add {U}.