Boros Signet

Reliquary Tower

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

Void Rend

This spell can't be countered.
Destroy target nonland permanent.

Great Furnace

Azorius Signet

Sol Ring

Breya, Etherium Shaper

When Breya enters, create two 1/1 blue Thopter artifact creature tokens with flying.
{2}, Sacrifice two artifacts: Choose one —
• Breya deals 3 damage to target player or planeswalker.
• Target creature gets -4/-4 until end of turn.
• You gain 5 life.

Arcane Signet

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

Vault of Whispers

Izzet Signet

Mind Stone

{T}: Add {C}.
{1}, {T}, Sacrifice this artifact: Draw a card.

Orzhov Signet

Seat of the Synod

Dimir Signet

Buried Ruin

{T}: Add {C}.
{2}, {T}, Sacrifice this land: Return target artifact card from your graveyard to your hand.

Rakdos Signet

Thought Vessel

Jan Jansen, Chaos Crafter

Haste
{T}, Sacrifice an artifact creature: Create two Treasure tokens.
{T}, Sacrifice a noncreature artifact: Create two 1/1 colorless Construct artifact creature tokens.