Damage Booster

threads of fate is free value and an excellent start to the game. I never choose any other power first.

You want to pick weapon power and attack speed for this build, so we start with those two commons.

for survivability, i like electrolytes, since 100 overhealth on round 1 makes mercy ~325 hp and is pretty tanky to start. You keep it the whole round if you don’t get shot much. It also has the added benefit of the enemy getting 0 ult charge off of you until it’s burned through, which is big for disrupting their ult econ and swinging those early game fights into your favour for easy wins upfront.