These changes will come on this weekly reset (US-Today/EU-Tomorrow/China-Thursday).
The slow effect (Leaden Foot)
What it does
This reduced your movement speed and stacked.
The highest movement speed reduction is 90%.
The Nerf
It will be changed to 50% reduction instead of 90% with a maximum of 10 stacks. 
The Split Personality effect
What it does
This spawned several clones of you and surrounds you in a circle for 6 seconds, with just one spot to exit. 
If you touch it, you get disoriented for 4 seconds.  
The Nerf
The clones will last for 5 seconds instead of 6 seconds.
If you touch it, you get disoriented for 2 seconds instead of 4 seconds.

Other posts
- Everything Coming in World of Warcraft Patch 11.2.5
 - Midngiht Collectors Edition LEAKED
 - +63 Key for 740 ilvl Reward in Legion Remix Mythic+
 - The Ultimate Legion Remix Gearing Guide: How to Max Out Your Item Level Fast
 - What comes out in Midnight - World of Warcraft
 - Legion Remix: Everything You Need to Know About WoW’s Fast, Fun, and Fel-Filled Seasonal Event
 - Week 1 Coffer Keys Guide for Patch 11.2
 - War Within Season 3 Pinnacle Cache Guide: Massive Reputation Gains in Patch 11.2
 - Gear update week 1: Get 2 Veteran pieces 668+ ilvl
 - All lore objectives in 11.2 Karesh
 





