4 cards where the card is tagged “synergy-monocolor”

Emergent Ultimatum (Ikoria: Lair of Behemoths #185)
Maestros Confluence (New Capenna Commander #75)
Tarnation Vista (The Big Score #30)
Throne of Eldraine (Wilds of Eldraine Commander #28)

The message was clear to Sorin—time to search for something else.