Illushu was a ka sealed in a stone slab in the Shrine of Wedju. After acquiring the Millennium Ring, Bakura gained the ability to summon ka from the shrine. During a battle against Atem and the High Priests, Bakura secretly summoned Illushu to use as a decoy. Illushu was hidden in the darkness and blocked an attack from Duos, whose sword was thrown at Diabound. Illushu was consequently destroyed and since it was a weak ka, it did not cost Bakura much ba.