All Plus Counter-Injury, Do You Call This a Useless Shield Guard?

[National job transfer + 10,000 times more fun + childhood sweethearts + extreme values ​​+ hard core will not eat soft rice] Over the past hundred years, the abyss has fallen and everyone has changed their jobs. During the awakening ceremony, Chu Feng awakened the most useless whiteboard profession [Shield Guard], and his talent was the lowest [Thorns: 10 points of damage when attacked]. Facing the ridicule from everyone, Chu Feng remained calm. However, his childhood sweetheart Su Muxue awakened the only mythical profession [Valkyrie]! The alliance envoy arrived to take Su Muxue away, and condescendingly handed Chu Feng 100 million alliance coins, telling him to go to the safe zone and work as a soft-fed logistics worker, so as not to hinder the pace of the mythical genius. Chu Feng decisively refused and made a bet with the special envoy: he would take first place in the abyss wilderness trial three days later and be admitted to the highest core university based on his strength! Just when everyone thought he was crazy and was going to die, Chu Feng awakened [Billions of Times Experience System]! Ten thousand times the experience at the start! The multiplier increases tenfold every time you change jobs! In the wilderness, a low-level demonic rat bit him, losing 0 blood and inflicting 10 damage in return. Bite! Withstand the attack, thorn talent experience +10000! [The talent of Thorns has been upgraded to level 999: 100,000 points of real damage will be reflected after being hit! The special envoy thought he died in the wilderness, but the Demon King of the Abyss came and slapped Chu Feng on the body. Chu Feng was safe and sound, but the Demon King was injured tens of billions on the spot and turned into blood mist instantly! "You say my shield guard is rubbish? Then I'll deal a trillion damage in return. How do you deal with it?"