This clone of nepenthes sericea likely has chimeric variegation. I've grown it out for the past few years and it appears to be stable, so far all of the plants are maintaining their variegation (the largest one is the first photo). Unlike Philodendrons, Nepenthes chimeras are quite difficult to propagate en-vitro, so this clone will rarely be offered.
An important note about chimeras: unlike genetic variegation, the pattern changes with every leaf. These plants do grow noticeably slower than normal sericea. Each plant will be shipped unpotted, priority.