RNA has for long been considered as one of the most essential biomolecules necessary for the emergence of life on Earth, owing to its capability to carry genetic information and perform catalytic activity such as generation of activated nucleotides and polymerisation of nucleic acids . Considering that synthesis of complex proteins first required the emergence of RNA-based translation , it is likely that early RNA sequences operated in the absence of protein-based enzymes. Therefore, self-replication is considered as one of the most fundamental functions of prebiotic RNA sequences and, in fact, it was demonstrated that ribozymes can not only catalyse template-directed RNA primer extension but also support the evolution of catalytic RNA assemblies . However, before the formation of complex rybozymes, first short RNA oligomers could only undergo a more primordial form of nonenzymatic template copying, which enables the incorporation of activated nucleotides into the copied strand with minimal catalytic support of metal cations.