Here is the weekly Amirdrassil Raid tuning in the latest Patch 10.2 build which includes Mythic Nymue mechanics.
Roots burst forth from the empowereddoomed soil, inflicting 166275 Nature damage to players up to 3 yards and knocking them away.
Gnarlroot shoots missiles at his current target over 2 sec, each inflicting 116393 Physical damage and 116393 Shadowflame damage.
Each impact also causes the target to take 24% increased Shadowflame damage for 34 sec. This effect stacks.