Legitimate PSA, CGC, and BGS slabs have multiple security features: certification numbers you can verify on their websites, tamper-evident seals, specific label designs that are difficult to replicate, and quality encapsulation that fakes can't match
Being able to draft fixing, even for a two color deck, is very powerful
See the market value for every Prismatic Secret Rare and Over-Frame card, including the 140,000 JPY grail
I still have a few in my list, but some ridiculous percentage (~70%) of my creatures have 2 or less toughness, so defensive measures typically tend to be attempting to craft profitable trades
Regrowth, Remember the Fallen, Seasons Past, Praetor's Counsel, Eternal Witness, Skullwinder, Emeria, the Sky Ruin, Emeria Shepherd, Sun Titan, Greenwarden of Murasa Tutors: Open the Armory, Steelshaper's Gift, Stoneforge Mystic, Stonehewer Giant, Inventor's Fair, Relic Seeker, Quest for the Holy Relic, Survival of the Fittest, Green Sun's Zenith, Chord of Calling, Eladamri's Call, Worldly Tutor Other Equipment Goodies: Sigarda's Aid, Blade of Selves, Masterwork of Ingenuity I Win: Grafted Exoskeleton White brings all the Equipment-themed cards to the deck, while Green brings superior ramp, recursion, and creature tutors
Of those that have, the prices are ranging wildly, with some sellers listing their pulls for around $3,250 (a reasonable price for a serialized card), and others listing them for as much as $35,000