Strategy on how to play with Karina
After reaching level 4 and releasing the ultimate, it's time to move on to other lanes. When managing an assassin hero, you shouldn't limit yourself to just one lane and jungle. Go to the middle lane, press the enemy, and try to kill them if possible to get stronger.
You can use skill 1 - Dance of Blades to move faster around the map. When Karina uses this skill, she will increase her speed by 5% for 3.5 seconds and block enemies' basic attacks. Then use Skill 2 - Dance of Death to deal more magic damage, and finish off with Skill 3 - Shadow Strike, where Karina will attack the enemy hero, dealing magic damage and placing a shadow mark, leaving a shadow figure behind the enemy for 5 seconds.
In the middle of the game, you will already be able to deal a lot of damage to enemies and team fights will become more frequent. Do not rush to start fights because Karina is low on defense, you have to wait until your team starts fighting to be able to attack and destroy enemies with less health.
By the end of the game, you should have a nearly perfect build configuration. Usually, you can immediately eliminate the enemy by attacking; if this is not possible, check your composition and the build structure of the enemies. When starting a team fight, wait for your team to start the fight before going into combat. Always target valuable enemies like marksmen or mages and finish them off to give your team an edge.
After that, move away from the battle and other enemies, hide in the bushes, or go back to the base and wait for your abilities to recharge before returning to the battles with the team.