Theft cards are already extremely powerful in Commander, so stapling you become the monarch to a theft card makes it even more insane
Also, sliver decks tend to go pretty wide so being able to tap all your creatures to draw a card, while also dealing massive amounts of damage each time is busted
This card is going to see a lot of love, and we can't wait to kill it just before it transforms.
There are a lot of other lands in this deck that do similar things to Cavern of Souls, so you could always cut it and replace it with either another dual land or a basic land
If I'm playing a creature-based aggressive deck, I might prefer more creatures or a more flexible removal spell like Lightning Strike
An affordable promo for collectors on a budget Sees some competitive play Not much financial value for ambitious collectors Robin Hood, Capable Fighter makes a handful of appearances in competitive Lorcana decks