The buff from the abillity showed up and gave dmg and hp to my toxic anuran in a full faction deck. The enemy player had a split IS/KF faction, and I think it turned up after he deployed a KF unit. Screenshot:
The ally kf triggers from tortun broadside, that is a kf/fs split champion, every tortun works to trigger ally on your anurans and wardens, so know that it's not a bug and take it into account when building your bg, as you can land 4 units with ally kf that are synergetic between them and with some of the tortuns that trigger his ally (broadside and privateer captain mostly)