part of illusive realms mechanics is modifying her e skill to spawn dmg projectiles instead of healing like it usually does. combining it with a perk that reduces e cooldown when you deal dmg can enable you to overlap her e multiple times for escalating dmg. then theres also buffs that can give you dmg procs per certain amount of hits and as you can see she hits A LOT of times per second resulting in endless lag and damage
dude do you even know why they didnt upload all characters in illusive realm? because it's periodically. 1. takes time to build the character's kit 2. so we can always look forward who's gonna be next in the illusive realm 3. maybe there's rotation every month or so.