Azorius Signet

Dimir Signet

Arcane Signet

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

Orzhov Signet

Gruul Signet

Niv-Mizzet Reborn

Flying
When Niv-Mizzet Reborn enters, reveal the top ten cards of your library. For each color pair, choose a card that's exactly those colors from among them. Put the chosen cards into your hand and the rest on the bottom of your library in a random order.

Boros Signet

Izzet Signet

Selesnya Signet

Simic Signet

Golgari Signet

Rakdos Signet

Have

Getting

Don't Have

Rainbow Dragons