19 cards where the block is “usg” and the lore includes “radiant”

Angelic Curator (Urza's Legacy #1)
Befoul (Urza's Saga #116)
Burst of Energy (Urza's Legacy #3)
Catastrophe (Urza's Saga #6)
Defender of Law (Urza's Legacy #5)
Hope and Glory (Urza's Legacy #9)
Humble (Urza's Saga #18)
Intrepid Hero (Urza's Saga #19)
Knighthood (Urza's Legacy #12)
Pariah (Urza's Saga #28)
Path of Peace (Urza's Saga #29)
Peace and Quiet (Urza's Legacy #17)
Persecute (Urza's Saga #146)
Radiant, Archangel (Urza's Legacy #20)
Radiant's Dragoons (Urza's Legacy #21)
Radiant's Judgment (Urza's Legacy #22)
Redeem (Urza's Saga #33)
Serra Zealot (Urza's Saga #46)
Sustainer of the Realm (Urza's Legacy #23)

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