She was not, however, alone in her philosophical and spiritual inquiry. Broll and Urbanowicz’s studio on Piastowska Street was visited by fellow artists Henryk Waniek, Zygmunt Stuchlik and Antoni Halor. These meetings evolved into seminars about art, philosophy and Eastern spirituality and gave rise to the formation of the Oneiron group. The name – literally meaning ‘dream’ in Greek – was proposed by Waniek. There were some different names in consideration, too – Urbanowicz suggested that the group be called Liga Spostrzeżeń Duchowych (League of Spiritual Discernments), abbreviated to LSD.
Oneiron became the central point of counterculture in Silesia. The group also ran an underground press, publishing texts by Jung, Mircea Eliade, and The Tibetan Book of the Dead, among others. The Piastowska Street studio was a place of art but also – perhaps most importantly – housed discussions about philosophy, religion, magic, the occult and gnosis. Oneiron collectively created Leksykon (Encyklopedia Symboli) (Lexicon: Encyclopaedia of Symbols) – 30 black square pieces of cardboard, the so-called ‘black cards’, each assigned to a letter of the alphabet and filled with words and drawings in a limited colour palette – white, silver and gold. Sometimes called Nowe Bezpretensjonalne Pismo Święte w Obrazkach (New Unpretentious Holy Scripture in Pictures) or Nowy Bezpretensjonalny Chaos w Obrazkach (New Unpretentious Chaos in Pictures), they were created between 1967 and 1969. Phrases such as ‘tree’, ‘pain’ or ‘Atman’ were the starting points. ‘Atman’, which is Sanskrit for ‘breath’, became one of the key concepts in Broll’s art. As Janusz Zagrodzki wrote: ‘[Atman] is a life element, an attainment of full consciousness, peak of personal growth that allows for a spiritual relation with Brahman’.