No other box toppers were shown in the most recent stream, but more variations on existing Magic cards were
(You may cast cards with retrace from your graveyard by discarding a land card in addition to paying their other costs.) If a spell you cast with retrace is countered, it's put back into your graveyard
The deck features a huge number of powerful cat creates many of which have strong secondary abilities include anthem effects (Kaheera, Feline Sovereign, Jazal, Regal Caracal, King of the Pride), card draw (Beast Whisperer, Feral Prowler, Generous Stray), token producers (Cubwarden, Jolrael, Leonin Warleader, Pride Warden, Regal Caracal, Garrison Cat), removal (Stalking Leonin), artifact/enchantment destruction (Enlightened Ascetic, Felidar Cub), and many more
For those hunting down The One Ring, collector booster packs are priced at $42 USD each and $420 USD for a booster box containing 12 packs and a box topper card
You can sacrifice a good number of lands and then search for Field of the Dead as part of its effect
And it's a real shame because modal lands with spells ARE a great design
