For any Lorcana card with meaningful raw value, particularly Cold Foil cards and Enchanted Rares which can command significant prices even ungraded, you should use a tracked and insured service without exception
With first strike and land-based synergy, it lets you place +1/+1 counters on lands whenever your creatures enter, then later you can move those counters to a creature to gain life and draw cards
My next recommendation comes in the form of Aeronaut Admiral
Im a little less sold on the Investigators, whose two abilities both seems generally useful but not terribly focused here
I wouldnt tunnel in on Grixis too early, but if you are drafting blue/red and havent seen any good payoffs, consider picking black removal and going the Grixis direction
I dont like when cards are this easy to turn into infinite combos, and I really dont like infinite combos to begin with