Yea and IIRC, thorn carapace adds 1 infection per hit, so if you're about to die you can use an adrenaline on something strong your opponent has (like a fire dragon with 12 attack and 3 hp) and I think it'll die on the first turn (12 damage, 1 infection, 3 life|11 damage, 2 infection, 2 life|2 damage, 2/3 infection, 0 life) Those'll be each of the 3 attacks it does (if it infects each of the first two times) if I'm not mistaken, meaning you only take 25 damage instead of at least 36 if you don't adrenaline it. That way you can use adrenaline defensively and offensively.