In this Guide you will find what I have learned and what I know more or less about this champion in this short period of time that I have been playing League of Legends, although this is not a very complete Guide, it may serve you to a lesser extent to learn some how many things

Rhaast lethality has a lot of damage, which gives you a greater healing including its R (Due to its recent buff) it is not usually highly recommended since Rhaast's objective is to endure a lot against the most powerful and resistant fighters, but it can serve even in against these as seen in the following clip: Play Video

1- With "Shadow Step", when you are near an enemy champion, a blue sphere will appear on the wall that will indicate more or less the location of the enemy champion:
2- When you are the shadow assassin, the "W" will make a shadow of yourself appear to do the attack for you, but the turret will count the shadow as a champion, so when you are taking down plates, you will receive less gold . . so if you want to receive the same gold as always, don't use your W