This could potentially backfire if you use it on the wrong creature (looks at guardian angel paired up with other creatures).
I like the idea, but I think this + Thorn Shield (deals poison damage to attackers) would make a lot of people rage quit over
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's excessive use of poisons. It's a good combo, but it's probably too good, especially seeing that there could be creatures that could use a quick-term investment/benefit from this over the regular Adrenaline.