Siege Wurm

Siege Wurm was introduced in the 2005 Magic: The Gathering set Ravnica: City of Guilds, serving as a representation of the Selesnya Conclave’s overwhelming brute force. Designed to embody the green-white guild's emphasis on nature and communal strength, the card features the convoke mechanic, which allows players to tap their own creatures to help cast the wurm. This design choice grounded the card within the set's broader mechanical identity of leveraging a wide battlefield presence to summon massive threats earlier than their mana cost would typically allow.

The artwork was provided by British illustrator Carl Critchlow, who has been a staple contributor to the game for decades. His depiction of the Siege Wurm focuses on the creature’s immense, segmented scale and its role as a living engine of destruction within the dense, urban sprawl of Ravnica. Upon its release, the card was well-received by players in the Limited format, where its ability to hit the board rapidly using smaller tokens made it a reliable and formidable finisher for green-aligned strategies.