Kassadin possesses a rewarding ultimate as it allows you to travel from one spot to another instantly, and even inflict a large amount of damage. But the downside of this ultimate, is the more you use your ultimate, the more you’ll lose mana. Each subsequent Riftwalk can consume 200% mana, making Kassadin a mana-hungry champion. This can however be solved by equipping items that provide mana such as Rod of Ages and Archangel’s staff. It is also advisable to take the blue buff as there is no item in the game that can help in regenerating mana.