This plant is likely a chimera that occurred in the process of tissue culture. Such aberrant ‘sports’ are not uncommon with this method of propagation. Essentially this is a leafless Alocasia plumbae, having only the stem and main rib of the leaf with only the tiniest vestiges of the actual leaf.
It’s almost surprising that this plant can survive at all. Another characteristic is that this plant is a dwarf, reaching only about 12 inches tall, max. It likes moist but not wet conditions, shade to bright, filtered light and warmth.