You can slap it in a Kenrith, the Returned King deck as an alternate win condition with a slightly worse manabase
[34] The rarities listed in increasing rarity are: Common (gray circle) Uncommon (white book) Rare (bronze triangle) Super Rare (silver diamond) Legendary (gold pentagon) Epic (rainbow semicircle with nib) Enchanted (rainbow hexagon) Iconic (rainbow octagon) The Epic and Iconic rarity were introduced in the Fabled set
Magic: The Gathering Arena has in place a special system for opening hands
While this Gideon only enters the battlefield with four loyalty, if sticks around the table long enough, its -6 allows it to function as great and flexible universal removal, capable of exiling any nonland permanent
Maindeck options Modern is a diverse format, which means your maindeck cant always be too custom-tailored to beating any one kind of deck
The only safe option is to exile the Obliterator, but without it, your opponents will be on a very short clock