Through the Breach {4}{R}
Instant — Arcane
You may put a creature card from your hand onto the battlefield. That creature gains haste. Sacrifice that creature at the beginning of the next end step.
Splice onto Arcane {2}{R}{R} (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)
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Cards that do something similar 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.
Cauldron Dance 100%
$0.35#13003
"You may put a creature card from your hand onto the battlefield. That creature gains haste. Its controller sacrifices it at the beginning of the next end step."
Dramatic Entrance 85%
$1.24#21112
"You may put a green creature card from your hand onto the battlefield."
Lure of Prey 85%
$3.64#23226
"You may put a green creature card from your hand onto the battlefield."