It has trample, haste, and "At the beginning of the end step, sacrifice this token." At the beginning of each player's upkeep, that player creates a 5/1 red Elemental creature token named Lightning Rager
In particular, the card is a great option for decks already built around stealing opposing creatures, like Edea, Possessed Sorceress and Don Andres, the Renegade
Hearthhull is a value engine and win condition in one, and is one of the most popular Precon Commanders of the year
Scute Swarm, Hornet Nest, Hornet Queen, Giant Adephage, and Moldgraf Millipede are all great choices
You pick the player furthest behind with the least powerful thing to copy, and you can make a friend
What makes Manaphys Oceanic Gift particularly useful is its lack of typing restrictions meaning it doesnt need to be used in a Water-type deck