Jawbone Duelist Toxic and double strike is a combo of abilities begging you to be creative
The best case for this is off a Sneak Attack where you deal 10 and gain 5, nice but only have the job and no lasting value or disruption
Similarly, creatures that enter the battlefield attacking later in combat won't be considered when determining whether or not a creature attacked alone
Yorion, Sky Nomad is a solid blink card in the 99 of a Commander deck, and it really shined in Modern
Survival is still decent in a selection of creature heavy midrange decks where you have utility creatures, late game finishers you don't want early and ramp dorks you don't want late
While it's certainly possible to get lucky and double your money with a box of Masters 25 even at current box prices, which are around $180$190if your goal is to build a Modern collection, you're probably better off spending your money on newly cheap Thalias, Eidolon of the Great Revels, Blood Moons, Utopia Sprawls, and the like