This Portal Event adds an increased chances for Water Heroes. The exact details go as following:
Great Summon[]
Featuring 
Selwyn the Enduring!
Heroic Summon[]
Featuring Water Heroes! The heroes included are: 
IGOROK, 
Icebloom, 
Icepick and 
Yokozuna.
Honor Summon[]
Featuring 
Samurai Takumi!
Notes[]
Sir William, 
Yasmin Bloom, 
Stone Fist and 
Therand Fiddlestrom have normal appearance rates.
It is currently unknown if 
Indigo has increased rates in the VIP portal or not.