( these seals are based of the seals of naruto anime so i made my own )

this seal is a bloodline seal that mix the host and xenomorph dna together there several things this seal does

1) first this seal is a tattoo type seal it can not be put on paper meaning there no temp usage of the powers

2) this seal one put on there sever things that will happen one the hand and part the leg will become like that of the xeno as also they will grow a tail second they also for the secondary mouth or depend on that host
this is also this pass down genetically from parent to offspring

3) if the seal on a male host they will when time come will look for a mate /wife when this happens after mating and the love bite she will also for a seal will either appear on ther stomack or back this making the female part of the hive this can also work vice versa with afemal to male

4) also with this bloodline that have ablity to summon up xeno like summon animal each xeno haveing ther own personality since the xeno are also part human in some way

5) also if a group of these blood line hold vote for a queen she will form the queen head crown on hir head as well a secondary pair of arms also as prive of being queen she will form lay actual xeno egg that will skip the face hugger stage and lay 20 eggs and give them to the summons this way this both xeno blood line and the summon are blood relate in a sorta way .