The gigantic spawn of the cross N. (kampotiana x maxima) x (eymae x ephippiata) by Nicholas LeBlanc in 2016. Unnaturally vigorous, unnaturally attractive. Should do fine on most windowsills.
Plants are year-old established cuttings, have far outgrown their 3” pots. They grow fast especially when given a big container. They are variously sized between 8-12” across, but they all grow at the same rate - there are no runt cuttings of this plant.
The cultivar description can be found in the CPN: