Magnesium?
In the old days I'd never got that cheap magnesium fire starters to work as advertised, to get the stuff to burn I had to use a propane torch, I just use the striker side anyway, I use a short stub of hacksaw blade to strike the sparks off onto vasiline saturated dryer lint, loft it some and strike it a couple blows of sparks with the saw side of the blade stub, works great with old dead grass & weeds and sqaw wood.I wrap the vasilene lint in a small paper wrapped bundle with the saw blade stub and attach to cheapie striker block with a rubberband or two.
#2 in later years when beach combing if I needed a fire From rain soaked grass I grabb a handfull of the deadist grass I can get, make a good size 2" twist, hold it to a running ATV header pipe till it ignites, for fire building take a twist of same damp grass and dip in gas tank and place under tinder twiggs & damp grass, then set the smouldering header dried grass next to the gas soaked tinder grass she'll light off nice.
The jelled Hand sanitizer helps ignite damp grass too.
In the end I just carry a Welders Torch striker and a ziplock baggie of doctored dryer lint with magnesium sprinkles mixed in the vasilene, I can turn the striker so its over what I want sparked and useally 3-4 rasps is plenty "To Do Pinpoint Striking", somthing even blast matches cant do.