Sonic Burst 
Instant
$0.14 #29753 0.27 28.2 years
As an additional cost to cast this spell, discard a card at random.
Sonic Burst deals 4 damage to any target.
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Cards similar to Sonic Burst expected a card that isn't here?
Reports become test cases the matcher is graded against before an update ships. Delvefall isn't a chatbot guessing, it compares the printed rules text of every card with plain math, and examples like yours decide which differences should count.
Acceptable Losses98%
$0.08↓#291000.2924.9 years↓
"As an additional cost to cast this spell, discard a card at random."
+1 more matching line
Sonic Seizure96%
$0.16↑#294570.2724.6 years↓
"As an additional cost to cast this spell, discard a card at random."
+1 more matching line
Cleansing Screech93%
$0.13↓#306810.12↓8.2 years↓
"this card deals 4 damage to any target."
Unfriendly Fire93%
$0.05↓#280880.298.9 years↓
"this card deals 4 damage to any target."
Flame Lash93%
$0.15↑#18602↑0.74↑9.9 years↓
"this card deals 4 damage to any target."
Lightning Blast93%
$0.19↑#22209↑0.00↓28.9 years
"this card deals 4 damage to any target."
Volcanic Hammer93%
$0.08↓#21699↑0.2629.3 years↑
"this card deals 3 damage to any target."
Lightning Strike93%
$0.10↓#2314↑0.1812.9 years↓
"this card deals 3 damage to any target."
Open Fire93%
$0.06↓#23469↑0.00↓9.1 years↓
"this card deals 3 damage to any target."
Precision Bolt93%
$0.17↑#272780.00↓7.9 years↓
"this card deals 3 damage to any target."
Fire Ambush93%
$4.33↑#297470.00↓27.3 years
"this card deals 3 damage to any target."
Searing Spear93%
$0.09↓#16650↑0.2714.1 years↓
"this card deals 3 damage to any target."
Explosive Impact93%
$0.10↓#258060.2513.9 years↓
"this card deals 5 damage to any target."
Shock93%
$0.05↓#2217↑0.08↓28.5 years
"this card deals 2 damage to any target."
Cinder Storm93%
$0.13↓#23355↑0.00↓27.2 years↓
"this card deals 7 damage to any target."
Scorching Spear93%
$0.14#296930.43↑29.3 years↑
"this card deals 1 damage to any target."
Searing Wind93%
$0.51↑#15908↑0.2026.3 years↓
"this card deals 10 damage to any target."
Volcanic Geyser93%
$0.12↓#12777↑0.07↓29.9 years↑
"this card deals X damage to any target."
Blaze93%
$0.09↓#11281↑0.17↓29.3 years↑
"this card deals X damage to any target."
Zuko's Offense92%
$0.23↑#19976↑0.00↓0.8 years↓
"this card deals 2 damage to any target."