1 random passable trait will not pass to summons, while all other traits/boosts not effected have an extra chance to pass.
Tier 2-4 increases that number by 1 per tier and gives an extra chance for uneffected traits/boosts each time.
Tier 5 simply gives a 10% chance each to block on all that can pass and a total of 5x the chance to pass everything uneffected. Can remove itself during rebirthing at Tier 5.