I Have Awakened to Full Level Defense and Want to Be the Output!

The game has come to reality, with monsters, beasts, and copies everywhere. Su Mo awakened to be absolutely defensive at the beginning, but he only wanted to be a DPS. Because while he awakened absolute defense, he also awakened a growth ability. Killing Heart: As long as you kill an enemy, you can increase your attributes by one point. The more powerful enemies you kill, the more attributes you will gain, and there is no upper limit on stacking! Classmate: "Is it reasonable for you to stand and attack the boss as a DPS!" Su Mo: "I can't even resist, so why should I output? The real output should be to withstand the enemy's damage! Fight against him!" Classmate: "But the boss won't lose any blood when he hits you!" Su Mo: "That's because it doesn't output enough!"