Deep Blue wrote:As far as i know it should works as ring of ice/mist. Basically it triggers when an attack is successful and probably it forces a reroll with a 85% success chance (a bit like bad omen, lets say). I'm not 100% sure but it should be like this.
It's pretty much that. This kind of effect uses it's own roll to apply itself after a specific trigger.
For Survival Instinct, it will trigger once damages (almost any source, things like life drain or poison are immune) are about to be applied on the unit and attempt a 15% roll to activate (similar to the Vanguard in Dota, if I'm correct).