Travel Through Another World and Create Shocking Modern Technology

Traveling through a different world, there is no system, how can I survive in this difficult world? Is it materialized by magical power? ... Warcraft invades! Watch me use my magic power to substantively defeat the enemy and let the enemy know why the flowers are so red! An evil dragon is harassing! Watch me use my magic power to substantively... Repulse the enemy and make the opponent directly become a mount! What should I do if the count defaults on my wages? Watch me use magic... Use my strength to take down her daughter, and let her know what it means to repent! "Other countries are coming!" "It's okay, watch my magic power materialize!" "What do you want to do?" "I want to test a courier, a courier that can make people happy." ... There is no system, no problem, from now on I will rely on plug-ins to live in a different world!