C1213 Long Lan's Innocent Allegiance

"The Netherworld Ancient Formation. Only if you swear your loyalty to this formation will you be bound by the Heavenly Dao."

"To put it simply, if you make an oath in the ancient formation of the Netherworld Kingdom, then once you break the oath, you will be killed by the Heavenly Dao."

Qi Haotian pointed at the ancient array and introduced it to Loong Lanqingqing and Dragon Black Heavenly Star