27 cards where the set is “mom” and the text includes “convoke”

Aerial Boost (March of the Machine #2)
Ancient Imperiosaur (March of the Machine #174)
Artistic Refusal (March of the Machine #46)
Astral Wingspan (March of the Machine #48)
Burning Sun's Fury (March of the Machine #133)
City on Fire (March of the Machine #135)
Collective Nightmare (March of the Machine #95)
Complete the Circuit (March of the Machine #52)
Cut Short (March of the Machine #10)
Halo Hopper (March of the Machine #260)
Hoarding Broodlord (March of the Machine #110)
Interdisciplinary Mascot (March of the Machine #326)
Invasion of Segovia // Caetus, Sea Tyrant of Segovia (March of the Machine #63)
Invasion of Segovia // Caetus, Sea Tyrant of Segovia (March of the Machine #63)
Joyful Stormsculptor (March of the Machine #243)
Knight-Errant of Eos (March of the Machine #26)
Meeting of Minds (March of the Machine #66)
Pile On (March of the Machine #122)
Ramosian Greatsword (March of the Machine #159)
Referee Squad (March of the Machine #327)
Shatter the Source (March of the Machine #164)
Shivan Branch-Burner (March of the Machine #165)
Stoke the Flames (March of the Machine #166)
Temporal Cleansing (March of the Machine #80)
Thunderhead Squadron (March of the Machine #81)
Transcendent Message (March of the Machine #83)
Wicked Slumber (March of the Machine #84)
Zephyr Singer (March of the Machine #86)

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