2018. Project of Dutchman Peter Johan Nÿland with contributions from members of Trepaneringsritualen, Dead Neanderthals, Turia and veteran experimental vocalist Greetje Bijma. They help Hadewych to function mor..

2020. 'Welving' is the second album by the avant-garde black metal, neofolk and black ambient collective connected to Trepaneringsritualen, also featuring members of Dead Neanderthals, Turia and Eerie Wanda.