Specifically, this black two mana creature has Flash, meaning that it can be cast at any time, and gives another attacking Pirate Deathtouch when it enters the battlefield, an ability that lets a creature destroy any other creature that they deal damage to
This lets you quickly rack up damage in cases where you would have to focus on one opponent at a time
Sire of Stagnation Sire of Stagnation is huge when it hits, and getting to draw two cards whenever your opponent plays a land is huge
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Angel of Suffering Angel of Suffering offers a unique way to fill your graveyard, plus a life buffer of sorts
We could imagine Jetfire, Ingenious Scientist being useful in an Adapt deck that plays around with +1/+1 counters, but your Creatures would have to be Artifacts as well since Jetfires ability does not apply to non-Artifact Creatures