Aether Spike 

Instant
$0.19 #7544 0.19 2.3 years
Choose target spell. You get 
(two energy counters), then you may pay any amount of
. Counter that spell unless its controller pays
for each
paid this way.
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Cards similar to Aether Spike 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.
Oppressive Will80%
$0.18↓#24398↓0.43↑21.4 years↑
"Counter target spell unless its controller pays
for each card in your hand."
Evasive Action80%
$0.26↑#18189↓0.44↑25.4 years↑
"Counter target spell unless its controller pays
for each basic land type among lands you control."
Die Young80%
$0.13↓#25036↓0.00↓10.1 years↑
"Choose target creature. You get 
, then you may pay any amount of
. The creature gets -1/-1 until end of turn for each
paid this way."
Jwari Disruption // Jwari Ruins78%
$0.38↑#2670↑0.236.1 years↑
"Counter target spell unless its controller pays
."
Rakshasa's Disdain78%
$0.04↓#18808↓0.2911.7 years↑
"Counter target spell unless its controller pays
for each card in your graveyard."
We Say Thee Nay!77%
$0.19#12005↓0.230.3 years↓
"Counter target spell unless its controller pays
. Counter that spell unless its controller pays
instead if this spell was cast using teamwork."
Thassa's Rebuff77%
$0.37↑#15129↓0.2712.7 years↑
"Counter target spell unless its controller pays
, where X is your devotion to blue."