18 cards where the card has the keyword “Spell mastery”

Animist's Awakening (Commander 2020 #166)
Calculated Dismissal (Magic Origins #48)
Dark Dabbling (Ultimate Masters #91)
Dark Petition (Magic Origins #90)
Exquisite Firecraft (Magic Origins #143)
Fiery Impulse (Magic Origins #145)
Gather the Pack (Magic Origins #178)
Gideon's Phalanx (Magic Origins #14)
Kytheon's Tactics (Magic Origins #25)
Necromantic Summons (Magic Origins #110)
Nissa's Pilgrimage (Commander 2017 #155)
Olórin's Searing Light (Tales of Middle-earth Commander #503)
Psychic Rebuttal (Magic Origins #67)
Ravaging Blaze (Commander Masters #250)
Send to Sleep (Magic Origins #71)
Swift Reckoning (Ultimate Masters #39)
Talent of the Telepath (Magic Origins #78)
Unholy Hunger (Ultimate Masters #120)

It is the moment of discovery, the triumph of the mind, and the end of these results.