Holy Hand Grenade of Antioch

After reading & following instructions in the
Book of Armaments provided, it deals 2d6x10
damage to a 40' AOE.
First shall thou take out the holy pin. Then
shalt thou count to three. No More, No Less.
Four shalt thou not count, nor two except on
the way to three. Five is right out. Once the
number three is reached, being the third number,
lobbest thou the grenade at thine enemies.