Just as Devil Lord Black Heaven unleashed his divine ability, Dark Sky Curtain, and hurriedly activated several true treasures to defend himself.
That seemingly insignificant speck of deep azure light had already streaked down through the sky, suddenly blazing with dazzling azure spiritual light.
Boom!!!
Amid the brilliant azure radiance, an azure light ring resembling a nuclear explosion formed in the blink of an eye and slammed into the thick, pitch-black barrier.
The power at the heart of the explosion unquestionably reached the fourth-tier peak.
Even great cultivators generally struggled to unleash attacks of this level; only those at the Nascent Soul peak could do so easily.
Blood Sea Devil Lord, Devil Lord Black Heaven, True Lord Profound Mystery, and the others normally found it difficult, unless they employed some additional trick, such as a secret art that instantly consumed several times the usual magic power.
But now, with his four-hundred-zhang Starcloud Body and his ability to control Heaven and Earth spiritual energy, Liu Yu could unleash such attacks with ease.
Bang, bang, bang!!
Crack!
Terrifying power rippled outward as the might of Nebula Flash and Dark Sky Curtain was rapidly depleted.
In just a quarter of a breath, both released most of their power in a ferocious clash.
Faint cracking sounds rang out. The thick, pitch-black barrier rapidly thinned and faded, fissures appearing across its surface one after another, with wisps of azure light seeping through.
Yet dense demonic energy surged, and those fissures began showing signs of healing.
As shattering and healing tugged back and forth, the power of the two divine abilities was exhausted almost simultaneously.
This outcome was hardly surprising.
Dark Sky Curtain was, after all, Devil Lord Black Heaven's life-bound divine ability, one specialized in defense and incomparable to ordinary spells.
Caught off guard and