Tan Yun Mansion, Room Geng.
Yang Chan stopped his Tiger Demon Martial Seal cultivation. Martial Seal Cultivation involved sitting in quiet visualization to strengthen one's Spirit. This allowed the Martial Seal to leave the body and augment one's physical form, increasing combat power.
If one's Spirit was insufficient, the Martial Seal couldn't coalesce and therefore couldn't be used for augmentation.
Previously, when Yang Chan's Tiger Demon Martial Seal had just reached Tier Two Entry, he could augment himself with it. However, it was unstable back then and shattered easily. That problem vanished once his cultivation of the Tiger Demon Martial Seal was halfway through the Tier Two Entry stage, but successfully augmenting himself with the Power of Two Tigers was still difficult.
His Spirit was simply not strong enough to condense two Tiger Demons.
The more augmentations a Martial Seal provided, the greater the demand on one's Spirit.
