I wondered the same thing too . Perhaps the current species should be recategorized into two separate ones . ? We have flowers with variable stigma and style lengths that can only cross with individuals with different variations , if I recall correctly . But this seems to go beyond that . <| sep |> I mixed up left and right . <| sep |> Valla AurielKerrigan LiMingTyrael GreymaneXul LiMingTyrael KerriganKerrigan AbathurTassadar SonyaTassadar TracerTassadar IllidanSanctification with a melee assassin between two players on the same page usually is a great thing . Tassadar enables a lot of Heroes to the next level Greymane and Valla can be added to that list . Valla and Auriel can face check tanks and sustain through damage forever if they know how to kite properly . One of my best friends plays a sick Kerrigan , and I play a sick LiMing . He sets up one kill , then I kill the whole team . Xul has a similar setup but it isn ' t as fast , so it can be bodyblocked by tanks . He provides waveclear as a tradeoff . I also play Kerrigan decently well , and my friend plays a good Aba and great Kerrigan , so the double Kerrigan gets pretty wild .