After King Vijaya, also known as Vijayindu, the throne was next ascended by a prince named Sanghatissa.
About this prince and two other princes who later became kings, the Mahavamsa records a remarkable story.

There were three royal princes who were close friends residing in Mahiyangana.
When they were on their way to Anuradhapura to attend the royal consecration ceremony (Rajyopasthana), they walked along the Tissa Wewa bund.
There, an old blind Brahmin, who lived in a nearby house, heard the sound of their footsteps and proclaimed that these three would one day become kings.

This prophecy was heard by the last of them, Prince Gothabhaya, who turned back and inquired which of them would reign the longest.
When he learned that it would be himself, the three princes proceeded together to Anuradhapura, where they met King Vijayindu and served him faithfully and loyally.

However, one day, while they were in the royal palace, they killed King Vijayindu, and the eldest among them, Prince Sanghatissa, was consecrated as king.

Beyond what is stated in the Mahavamsa, no other historical record provides further details about this event.
There is no evidence in any chronicle about whether these princes were related to the former king or whether they had a rightful claim to the throne.
It is only clear that these princes belonged to the Lambakarna dynasty.

Thus, according to the limitations of available historical sources, it appears that the first Lambakarna royal lineage, which began with King Wasabha, came to an end after King Vijayindu.
However, certain epigraphic evidence has been found that helps clarify this matter.

A rock inscription found at Vessagiriya mentions that a certain offering was proclaimed during the second regnal year of King Sirinaka, and that it was engraved on the rock during the reign of King Tissa Maharaja, the son of King Sirinaka Maharaja, who himself was the son of King Tissa Maharaja.
The king first mentioned here, “Sirinaka,” can be identified as King Siri Naga — most likely Siri Naga I, who, according to previous accounts, ruled for nineteen years.

It would not be reasonable to assume that an offering proclaimed in his second regnal year would be engraved seventeen years later, after his son became king.
Therefore, the “Sirinaka Maharaja” mentioned here can confidently be identified as King Siri Naga II.
It is also stated in the inscription that he was the son of a king named Tissa Maharaja, which has already been noted above.

Some scholars interpret this Tissa Maharaja as King Bhatikatissa; however, this is unlikely, as the name “Tissa” alone does not appear in any existing inscriptions — he is always referred to as Bhatikatissa Maharaja.
Hence, it is more appropriate to identify this Tissa Maharaja as King Voharika Tissa.
Accordingly, the final king mentioned in the inscription, Tissa Maharaja, can be identified as King Sanghatissa.

It may be assumed that this prince, Sanghatissa, fled from Anuradhapura and hid in the Mahiyangana region for safety, possibly due to some internal conflict following the accession of his brother, Prince Vijayindu.
Another possible interpretation is that Prince Sanghatissa was the eldest son of King Siri Naga II.
During his father’s reign, he may have governed the Mahiyangana region together with Prince Gothabhaya, while the younger brother, Prince Vijayindu, remained with their father.
After the death of their father, although the royal inheritance rightfully belonged to Prince Sanghatissa, Prince Vijayindu ascended the throne instead.

Because of this, Prince Sanghatissa came from Mahiyangana with his followers and seized the throne.
Later evidence also shows that King Gothabhaya was a son of King Siri Naga II.
The subsequent events — King Thulatthana succeeding King Saddhatissa, and then Prince Lajjitissa seizing the throne — show a similar pattern to this.

Therefore, from the above facts, it can be concluded that Prince Sanghatissa of Mahiyangana possessed a legitimate claim to the throne, and thus the continuity of the first Lambakarna royal lineage, which began with King Wasabha, remained unbroken.

The Mahavamsa also states that King Vijayindu appointed Prince Sanghatissa as Commander-in-Chief (Senapati).
Later, as mentioned before, the king was slain in the royal palace itself, and Prince Sanghatissa ascended the throne.

It was a tradition of that era that every new king, upon ascending the throne, undertook some renovation or restoration work on the Great Stupa (Maha Seya).
Accordingly, King Sanghatissa first re-gilded the golden parasol atop the Maha Seya and adorned it with four gems, each worth a lakh (100,000 coins), placed around the sun emblem at the top of the square relic chamber.

He also installed a Vajrachumbataka (lightning conductor) to protect the stupa from lightning strikes.

Before the Sacred Tooth Relic (Dalada) became a state treasure — that is, before its arrival in the kingdom — the chief sacred objects of royal devotion were the Maha Seya and the Bowl Relics (Pathra Dhatu).
Therefore, kings considered it their duty to renovate the Maha Seya and protect the Bowl Relics.

It is said that during his reign, about forty thousand monks resided in the island.
Among them, Mahadeva Thera of Damagalla was a prominent monk.
The chronicles state that the king, being greatly devoted to him, followed his guidance and instructions — managing affairs of the city by stationing attendants at the four city gates and providing continuous gruel (porridge) to the people.
This act was intended to promote the health and well-being of the populace.

As noted above, the description in the Mahavamsa is confirmed with appreciation by Rajarathnakara, who also records that this king performed many religious activities.

However, King Sanghatissa eventually fell into conduct unbecoming of a ruler.
He developed a habit of going, together with the women of the inner palace, to the Pachina Dipa (Eastern Island) to eat Jambu fruits (maddan).

According to the Mahavamsa Tika, this island was located beyond Mahatittha, and it is believed to be the Iranativu Island of today — a sandy island situated to the east of the other islands, hence called Pachina Dipa.

However, the king’s visits with his retinue caused great distress to the island’s inhabitants.
In retaliation, they poisoned the Jambu fruits that were offered to the king.
After eating them, the king died.

From this incident, another important fact emerges — that the northern islands were clearly under the sovereignty of the ruler of this island (Sri Lanka).

The reign of King Sanghatissa lasted four years.