Ceta Sanctuary 
Enchantment
$0.23 #22723 0.56 25.4 years
At the beginning of your upkeep, if you control a red or green permanent, draw a card, then discard a card. If you control a red permanent and a green permanent, instead draw two cards, then discard a card.
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Cards similar to Ceta Sanctuary 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.
Goblin Anarchomancer71%
$0.34↑#558↑0.17↓5.3 years↓
"Each spell you cast that's red or green costs 
less to cast."
less to cast."