Datamined changes from current PBE release. Be aware that these changes are tentative and they might be changed or even reverted prior to the live patch.
Datamining only captures numerical changes. It doesn't capture changes to mechanics and bugfixes that may also significantly affect balance.
Due to the nature of how the datamining works it may also includes some of the changes that are already added to the live version in the most recent patch.
Updated: May 31 2AM
Live
PBE
Stargazer - Serpent
Stargazers chart a different constellation every game. This game: The Serpent.Allies in empowered hexes gain 5% Durability. Stargazers in empowered hexes gain more and poison enemies, repeating a portion of damage dealt as magic damage over 3 seconds.
(3) 5% 
, 25% poison damage
, 25% poison damage(5) 10% , 40% poison damage
, 40% poison damage(7) 15% , 60% poison damage
More hexes reveal at each player level, 60% poison damageStargazers chart a different constellation every game. This game: The Serpent.Allies in empowered hexes gain 5% Durability. Stargazers in empowered hexes gain more and poison enemies, repeating a portion of damage dealt as magic damage over 3 seconds.
(3) 5% , 20% poison damage
, 20% poison damage(5) 10% , 40% poison damage
, 40% poison damage(7) 15% , 60% poison damage
More hexes reveal at each player level, 60% poison damage