Plagiarism is a big deal. Being caught plagiarizing can cause you to fail your assignment or class, or even be expelled from the university, as described in the Lindenwood policy below:
The names of students found guilty of cheating, plagiarizing, or deception (including lying) will be sent to the University Provost. A first offense of academic dishonesty may result in a reduced or failing grade on the work/test or possible failure in the course. A second offense by an undergraduate student will lead to failure of the class, and a third offense by an undergraduate student will result in expulsion from the University. Graduate students are expelled after the second offense.
More importantly, plagiarism is lying and cheating. But you are not merely cheating the system; you are cheating yourself. If you are not doing the work yourself to learn something, you will not develop the research and writing skills necessary to succeed outside of academia.