24 cards where the illustration contains “seat-of-the-synod”

Artificer's Intuition (Fifth Dawn #23)
Beacon of Tomorrows (Fifth Dawn #24)
Blue Sun's Zenith (Mirrodin Besieged #20)
Darksteel Gargoyle (Darksteel #111)
Eyes of the Watcher (Fifth Dawn #30)
Instill Infection (Scars of Mirrodin #68)
Island (Duel Decks: Mirrodin Pure vs. New Phyrexia #46)
Island (Scars of Mirrodin #235)
Island (Mirrodin #291)
Island (Arena League 2004 #2)
Knowledge Pool (Mirrodin Besieged #111)
Lumengrid Augur (Mirrodin #39)
Lumengrid Drake (Scars of Mirrodin #36)
Lumengrid Gargoyle (Mirrodin Besieged #112)
Override (Mirrodin #45)
Razortide Bridge (Modern Horizons 2 #252)
Riddlesmith (Scars of Mirrodin #40)
Seat of the Synod (Mirrodin #283)
Seat of the Synod (Secret Lair Drop #301)
Steady Progress (Scars of Mirrodin #45)
Synod Artificer (Darksteel #34)
Synod Centurion (Fifth Dawn #161)
Synod Sanctum (Mirrodin #252)
Venser, the Sojourner (Scars of Mirrodin #135)

Though this query has ended, its relics still slumber in New Argive.