Its completely understandable to say to deck with it, and find something already built online, a practice called netdecking. Lots of Magic websites that catalog or archive decks show you the decklist and also provide a copiable list so that you can import the deck to MTG Arena or MTGO
Knowing them also lets you take advantage of the best long-term protection: protective binders and card sleeves
The ability to repeatedly create a legendary creature is always sort of awkward in Magic , but I predict you'll be able to figure out some fun ways to exploit this fact
Regardless of power level, Grixis is well-positioned to take advantage of his Mark of Chaos Ascendant ability by using life loss and direct damage effects to enable cascade
Beautifully printed top allows you to not only easily move your cards around as you take out your opponent, but also protect and look after your prized assets so they look as good as new
2 = Kinda Bad - These cards are generally unplayable under most circumstances