Warhost's Frenzy 

Instant
$0.17 #20955 0.11 4.0 years
Kicker
(You may pay an additional
as you cast this spell.)
Creatures you control get +2/+0 until end of turn. If this spell was kicked, whenever a creature you control dies this turn, draw a card.
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Cards similar to Warhost's Frenzy 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.
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"Until end of turn, any number of target creatures you control each get +1/+0 and gain "When this creature dies, draw a card.""
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"Creatures you control get +2/+0 until end of turn."
Ambitious Assault74%
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"Creatures you control get +2/+0 until end of turn. If you control a modified creature, draw a card."
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"Target creature you control gets +2/+0 until end of turn."