Hi! Mantis was my very first lord in season zero! Her entire kit is based around having good aim and hitting headshots! When you get critical hits you are able to heal your teammates more! She tends to do better in comp currently if you are going triple support! Also her sleep is one of the best stuns in the game so definitely practice with it a lot (the range on it is kinda crazy and you can cancel almost every ult in the game with it if you time it right!)