The details of her life remain the same as always. What it was that brought upon a change in her enough to lead to the classification of her world as a Lostbelt is her death. Not her death as it was known publically, by influenza. That death was faked, to allow her to escape from the public eye and to pursue a free-spirited life devoted to learning and journeys. The point of divergence lies with her second, true death. Insted of succumbing to Clock Tower plots, her friend and ally, Sherlock Holmes -- who would have been present for her death -- managed to successfully pre-emptively thwart the attempt on her life, as opposed to his failure in Panhuman History.
Helena was emboldened by the would-be assassination. She stipulated that if the organization had decided to take measures against her, then she was onto something. She assumed that her approach was validated as much as it was damned by the magi authority. She believed that her worldview and applications of said worldview could do more than influence magical theory, that it could revolutionize. She could forge a legacy that could stand for something greater than it did before. At that, Helena redoubled her efforts. She re-established contact with her closest friends, associates, allies. She took more voyages, gathered more research,
made the dots connect
connected more dots.
. Forged relationships with more allies. Gained more influence. Thwarted more attempts -- some were closer calls than others. Adventures plentiful enough to fill volumes of pulps.
She gathered more knowledge, and her strength grew. Her strength grew, and she obtained more and more means to protect that strength. Her soul blossomed, and her Reality Marble gelled. Helena could explore the world of the Mahatamas, but the prana needed to upkeep it was expensive, exhausting, all too brief. She'd have to delve deeper into the studies of bounded fields, alternate realms.
Eventually, she hit upon a breakthrough that sent her on an expedition to the British Isles, the land of her dogged critics/enemies.
The world of the Mahatamas, her world, was large. Nothing less would do. Less could have done, but there was no reason to turn away from her decision. The world of the Mahatamas is knowledge; knowledge is truth; the world grows upon the truth. If chaos were to well forth like hungry black tides by way of her theory, then she'd help to restore order and guide humanity with the light of Sanat Kumara as the lighthouse.
With such convictions, she staked her Reality Marble to the surface of the world.
She obtained Light. The Light was
The World Egg bent to her worldview. The Earth was pulled apart and pieced together with a copy, or shadow, of Venus. Temples and monoliths and relics and landmarks and secrets from Venus were projected onto the surface of the world. Earth and Venus became more than just sister bodies -- they would be as Siamese twins; conjoined, as if always. London became, and was, Lemurian as much as it was Londonian. That civilization was restored, or perhaps came into being. And on the site of the Age-ushering ritual, a tree more vast and high than any mountain rooted. A band of light stretched forth from it, all the way to the distant star of the true Venus, enabling the tree to act as an orbital elevator that bridged the second and third planets. This tree, a modern Yggdrasil, became known as the Ultimate Tree Bridge, and it would be ground zero for human contact with extraterrestrial life. Beings of many shapes, sizes, and origins came to Earth -- Venusians. Venusians which may or may not have truly existed without her, but which the hidden truths that connected everything confirmed. With Earthlings, Venusians, and Lemurians on the same world, ideas, beliefs, martial stances (particularly the storied, difficult to master and difficult to answer to Lemurian School), and technologies were shared and built upon. Interactions between the races are not without conflict, but compared to strife inherent to Panhumanity it is on a considerable positive upswing.
The new Age of Theosophy was a golden age for it. Theosophy's processes reigned uncontested. On the surface, the Association was kept in line, though murmurings of deep and isolated realms where the oldest of family systems are carefully cultivated, stayed for a turning of the tide. Theosophy grew in influence until it became the dominant faith and magic system of the world, greater than even the height of Christendom's. Other religions still existed, but their power and influence was diminished or, by necessity, recontextualized within the context of the new world. On the other hand, the degradation of Mystery has ground to a halt. Helena's Realty Marble isolated the Venusian-Earth from greater processes that would act upon it. Mystery was mysterious as much as it was to be known. It was a paradox to insulate all. Though the weather of the planet grew harsher, to reflect the Venusian aspect that had been added to it, the planet's residents adapted, to a degree and as a whole. Disasters still claimed lives, but it was no losing battle. Tesla and Edison, their relationship buffered by Helena's presence, but still highly explosive in its own way, were at the forefront of technological advancement and distribution. The development of robotics and electronic systems occurred much earlier in this timeline. Other comrades to Helena, their lifespans extended by means of all the boons of the cultural exchanges, likewise benefited in their own ways. As for Sherlock Holmes...
But, the development of humanity proceeded too rapidly and down too narrow a path. The answers to the Human Order's questions weren't broad enough. It hungered for primordial stew boiled in a powder keg aglut with the mob tyranny of possibility.
Helena Blavatsky's world became a Lostbelt, and its embers were left to smolder out on their own.
Such as it was until a deal was struck. The Ultimate Tree Bridge, now a fruit-bearing plant, was no longer the only mega-fauna to jut forth from the surface of the planet like an extended stem. It was joined by a Quixotic Tree--
--and Helena, the leader of the Theosophical State, became a Lostbelt Queen of the L∴V∴L Lostbelt, in addition to knowing the accompaniment of a magus known as a Crypter and their contracted Servant.