At sufficiently low temperatures competing interactions give rise to an abundance of system states and phase transitions. If a phase transition is accessible in a zero temperature limit, either by changing pressure or magnetic field, it is identified with quantum critical point (QCP) [3]. Strong quantum fluctuations in the vicinity of QCP and suppression in Fermi temperature result in the formation of a quantum critical matter which could potentially be universally described. Heavy-fermion systems are ideal candidates for studying such phase transitions. A lattice of partially filled f electron shells, which act as localized magnetic moments, dipped into conduction electron sea gives rise to intriguing physics governed by competing Kondo and RKKY interactions. As a heavy-fermion material is brought close to QCP, divergence in its effective electron mass is accompanied with an abrupt change in Fermi surface and development of magnetic ordering. Thus far, the abrupt quantum-fluctuation-induced change in Fermi surface was considered to be the result of system dimensionality. Therefore, the discovery of this phenomenon in a cubic system makes for an exciting research subject. Ce3Pd20Si6 (CPS) is cubic structure metal, with two distinct cerium atoms in (4a) and (8c) crystallographic positions which demonstrates an enormous conduction electron effective mass at low temperature. In the absence of an external magnetic field, competing interactions induce antiferroquadrupolar (TQ = 470 mK) and antiferromagnetic (TN = 300 mK) orders. Previous research efforts [1, 2] indicate that Ce(8c) position is magnetically active. Magnetic field of 1 T suppresses AF order and reveals QCP with abrupt Fermi surface change. Study of CPS metal in zero magnetic field is conducted by means of 105Pd nuclear quadrupole resonance (NQR, as low as 50 mK) and 6 T NMR of 29Si nuclei. Exceptional agreement with DFT calculations confirms experimental data. Results suggest that magnetic ordering arises between Ce(4a) positions which also show strong electronic correlations.