The Scarlet Keep

{t}: Add one mana of any color to your mana
pool, spend this mana only to cast Hive spells.
{2}{b}{g}, {t}: Return a Hive creature card
from your graveyard to your hand.
"This is the world the hive craves; a universe creased
by the edge of the sharpest sword."
— Toland, the Shattered