Thorn of the Black Rose isnt anything special at first glance, but its got one important thing going for it
Many token strategies prefer to use a token decks sheer numbers as fuel for powerful card effects to either to kill opponents outright, bleed them out as they try to preemptively deal with the growing swarm, or as cogs in a combo engine
Because of the Planechase tie-in, a few slots in each deck are dedicated to cards that interact with the planar deck
Urzas Saga can get half of the Cat Oven combo or Shadowspear, Sol Ring or Mana Crypt
The deck certainly looks absurd in SaffronOlive's video, below: You won't face any MTG Arena decks running Soul Spike just yet, as it's not yet part of the platform, but everything from Modern Horizons 3 will be legal in Timeless and Historic
or black, featuring more removals and discard spells