Guild Wars 2

Unlike the other stances, Glint utilities just have upkeeps, not flat energy costs. As long as you don’t go over 5 upkeep points, Glint’s utilities cost 0 energy to use, leaving you with >50 almost all the time. (The only time losing energy is likely to happen is at the very start of the match when you’re boon-sharing with all facets up, or if you go to AoE CC with the elite and you get interrupted)

Revenant abilities have an energy cost. (Which is that bar next to your profession mechanic that starts at 50%)

It’s a mechanic used often in video games/RPGs to limit how often you can use an ability without it being explicitly because of their cooldowns. (You might need to spend energy on something else, or might not regen it fast enough to use an ability on cooldown)

What if Death’s Knock would instead just lower the cooldown of lifeforce generating abilities by X% instead of attack speed/damage? That wouldn’t be unprecedented, and still fit the theme of Soul Reaping being about lifeforce generation and Shroud uptime. (Mesmers get an identical trait in Illusions that lowers the recharge of all abilities that generate illusions, and it affects 1-2 abilities on absolutely every weapon)