local function MG(NAME, DESC, IMG, SPEED, JUMP, GRAV)
	minetest.register_craftitem(NAME, {
	description = DESC,
	inventory_image = IMG,
	})

	minetest.register_on_joinplayer(function(player)
	local wielded_item = player:get_wielded_item():get_name()
	end)

	minetest.register_globalstep(function(dtime)
	local wielded_item = player:get_wielded_item():get_name()
	if wielded_item == NAME then
	-- 1 is default when defining the function below set everything you dont want to chnage to 1.
	-- The numbers are ratios compared to the default setting. 1=def, 2=2x, .5=1/2, and so on...
	set_physics_override(speed, jump, gravity)
	end
	end)
end

MG("magic:low_G", "Low Gravity", "magic_lg.png", 1, 1, .5)
MG("magic:high_S", "High Speed", "magic_hs.png", 2, 1, 1)
MG("magic:high_J", "High Jump", "magic_hj.png", 1, 2, 1)
MG("magic:ninja", "Ninja Powers", "ninja_star.png", 2.5, 1.5, 1)