Dire Undercurrents 
Enchantment
$4.58 #14777 0.47 18.5 years
Whenever a blue creature you control enters, you may have target player draw a card.
Whenever a black creature you control enters, you may have target player discard a card.
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Cards similar to Dire Undercurrents 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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"As long as enchanted creature is blue, it gets +1/+1 and has "Whenever this creature deals damage to an opponent, draw a card.""
+1 more matching line
Tocasia's Welcome74%
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"
: Target player draws a card. Activate only as a sorcery."
: Target player draws a card. Activate only as a sorcery."+1 more matching line
Arcades, the Strategist72%
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