Sword of Kos

{t}: Add {u}, {b}, or {g} to your mana pool
{t}{u}{b}{g}: Search deck for Runus Kos,
Avenger; reveal it and put it in your hand, shuffle your deck afterward
"He forged it to defend our home. Only a Kos
can wield it and unleash its true power"
-Vraska Kos