Shorikai is an 8/8 legendary Vehicle that sits in the command zone generating value every turn
Once this thing is in play, youre left with a truly terrifying threat
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
Wizards of the Coast confirmed that Tomb of Annihilation, Dungeon of the Mad Mage and Lost Mine of Phandelver would be the only dungeon cards introduced in Adventures in the Forgotten Realms, with no current plans to add further dungeons based on D&D adventures to the card game
Youll draw a lot of cards from it, and you can transfer some counters to the Mage and keep drawing new cards
Even if it eats some removal spell along the way, the damage is done