If it becomes a copy of a token creature, it copies the original characteristics of that token as defined by the effect that created the token
Some of the best cards to pair with Kenrith, the Returned King include: Training Grounds will dramatically reduce activation costs for Kenrith Biomancer's Familiar provides another source of activated ability cost reduction Agatha of the Vile Cauldron can actually drive all of Kenrith's abilities to just a single mana cost Illusionist's Bracers copies Kenrith's powerful activated abilities 3
MAY INCLUDE MULTIPLE RARE CARDSEvery Set Booster contains a total of 12 MTG cards, including 14 cards of rarity Rare or higher
Each have their own strengths and weaknesses, and I think there's a decent argument for having any of them as your commander: Szarekh, the Silent King is the face commander of the precon and gets a bad rep from the community for being "bad" when in reality it's the best commander for the stock list
This is exactly why he still appears in decks built around multiple planeswalker commanders
When you cast the card, it'll enter the battlefield under your control