Foil and older printings can reach 4080
Outside of removal, there's other powerful spells like the game-ender Exsanguinate, and the value engine Lingering Souls, both of which work well with Y'shtola's abilities due to being greater than mana value 3 when cast
1x Foil Oloro, Ageless Ascetic
(If this creature has no +1/+1 counters on it, put two +1/+1 counters on it.) You can always activate an ability that will cause a creature to adapt
Pair that with Duskmourns The Swarmweaver, which also has a delirium ability to give Insects and Spiders +1/+1 and deathtouch, and delirium quickly becomes a great tool in creepy-crawly decks.
Solitary Confinement Nobody likes losing games of Magic, so why not use Solitary Confinement to survive forever, provided everybody only wins through combat damage