Arcane Signet

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

Command Tower

Rip, Spawn Hunter

Survival — At the beginning of your second main phase, if Rip, Spawn Hunter is tapped, reveal the top X cards of your library, where X is its power. Put any number of creature and/or Vehicle cards with different powers from among them into your hand. Put the rest on the bottom of your library in a random order.

Sol Ring

Shrewd Storyteller

Survival — At the beginning of your second main phase, if Shrewd Storyteller is tapped, put a +1/+1 counter on target creature.