Untethered Express has Trample and Crew 1, requiring you to tap any number of creatures you control with total power of one or more to turn Untethered Express into an Artifact Creature until end of turn
Theres also another extra Pikachu card that comes from the Paldea Evolved set that can also be found in the promotional booster packs
Then you'd use Voltaic Key to untap the Candelabra, or Hurkyl's Recall to replay it, and do it again
Outside of Morcant decks, Elf Typal variants of Maralen, Fae Ascendant can also put Tyvar to good use
Luckily you can lean more on protective creatures to bolster your threat count and those are typically a lot higher power than the bestow dorks
The set's promo cards, which players could obtain by attending a pre-release event, were also spoiled pre-release