Sol Ring

Arcane Signet

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

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

Whenever a commander you control attacks, put a +1/+1 counter on it.
Partner (You can have two commanders if both have partner.)

First strike, vigilance
Akiri gets +1/+0 for each artifact you control.
Partner (You can have two commanders if both have partner.)

{T}: Add {C}.
{T}: Add {R} or {W}. This artifact deals 1 damage to you.