Shadow of the Goblin is an excellent pickup for mono-red decks and even other builds that like to take advantage of the graveyard
However, the "Prize" section on an Attraction is not a triggered ability, so that can't be chosen separately
Instead, this Rakdos commander enters tapped with six stun counters, preventing it from attacking or blocking until either every counter is removed, or when enough creatures have dealt combat damage to their owners
Wrap in Vigor Regenerating your creatures is generally worse than granting indestructible, if only because a handful of wraths like Damnation ignore it
No matter the commander, elves are incredibly synergistic with one another many of the options you didnt pick here will likely make your 99
In a deck with synergies the card is a combo kill machine