Although early unicorns had a range of abilities, unicorns usually care about lifegain and +1/+1 counters in the post- Modern Horizons era
Down in the Valley The first chapter on Down in the Valley feels insane: This is a landfall card that ensures you have at least one land drop to make
Like most Magic: The Gathering cards, the value of Mox Jasper depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Tarkir: Dragonstorm)
Do you have to run a bunch of utility lands for him to be effective
He lets you draw a card every turn when youve cast a non-creature spell
If its possible I can attach the macro and the mask image here, although I am resizing to a specific resolution that I am happy to use in my android forge - it may be smaller that you want