Shrouded Nerscylla

Shroud, Infect, Paralysis, Reach
Webbed - When this creature enters the battlefield
tap target creature, that creature doesn't untap
while you control this creature
{1}{w/b}{w/b}: Target creature can't attack or block
until your next turn.
Its different ability likely comes from its diet of
the Khezu, just like how the common Nerscylla can
secrete poison due to feeding on Gypceros.