Saulkyr, Tyrant of the dead

When Saulkyr enters, if it was cast, create Saulkyr's
Grace a Green and black enchantment token with
"Whenever a creature an opponent controls dies,
create a 1/1 black skeleton creature token."

Whenever one or more skeletons you control attack, attacking skeletons get +X/+0 equal to half the
number of attacking skeletons rounded down.

"Your kingdoms may have forgotten us, for that
we will never forgive."