@Talismaster
in that serie, giving a "name" is akin to giving a share of one's own magical power. a bit like transfering a bit of your MP (can be recovered over time), to give a "power boost" to your target, rather than reducing your own magical capacity.
if there is "overdose" of magical energy, then mutation to a more receptive body can happen (to absorb and retain that energy, called magicules)
progeny can at best only inherit part of one's parents, and mostly have the base characteristics of their races, so will be comparatively weaker than their parents when they reach same age as when they got "named".