The most important aspect of the card is that a three-mana 3/1 with menace is a decent rate on its own, which makes it easier for this card to find a home than Compy Swarm
Also, Jeskai Ascendancy can untap your creatures after casting an instant, so you can go infinite with a creature that taps for
Repeat this process until your Pokemon finally wakes up
Then Jacob takes any assassins you discarded (or put in your graveyard another way) and gets you that card
Two of the best mechanics lead to some pretty lovely cards from the era
These are my top Creature picks for a Raphael Commander build: Rakdos, the Showstopper, Wildfire Devils, Zurzoth Chaos Rider, Lorcan, Warlock Collector, Master of Cruelties, Fiendish Duo, Orcus Prince of Undeath, Rakshasa Debaser, and Karlach Fury of Avernus