Merow's abilities have no cost related to them, and the use of her abilities is only limited by cooldowns. Instead she uses Fury as her secondary resource. Merow starts with 0 Fury, and has a cap of 100 Fury. She gains 5 Fury per autoattack, 10 Fury per critical strike and an additional 10 Fury for every unit she kills. When out of combat for 10 seconds, Merow loses 5 Fury every second.