Descendants' Path 
Enchantment
$0.91 #2182 0.33 14.3 years
At the beginning of your upkeep, reveal the top card of your library. If it's a creature card that shares a creature type with a creature you control, you may cast it without paying its mana cost. If you don't cast it, put it on the bottom of your library.
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Cards similar to Descendants' Path 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.
Leaf-Crowned Elder90%
$8.47↑#10709↓0.2418.6 years↑
"At the beginning of your upkeep, you may look at the top card of your library. If it shares a creature type with this creature, you may reveal it. If you do, you may play that card without paying its mana cost."
Rashmi, Eternities Crafter83%
$0.39↓#3551↓0.259.9 years↓
"Whenever you cast your first spell each turn, reveal the top card of your library. You may cast it without paying its mana cost if it's a spell with lesser mana value. If you don't cast it, put it into your hand."
Galvanoth78%
$0.31↓#13054↓0.20↓15.6 years↑
"At the beginning of your upkeep, you may look at the top card of your library. You may cast it without paying its mana cost if it's an instant or sorcery spell."
Powerbalance76%
$0.32↓#24430.412.2 years↓
"Whenever an opponent casts a spell, you may reveal the top card of your library. If you do, you may cast that card without paying its mana cost if the two spells have the same mana value."
One with the Multiverse74%
$2.65↑#19190.74↑3.8 years↓
"Once during each of your turns, you may cast a spell from your hand or the top of your library without paying its mana cost."
Yennett, Cryptic Sovereign73%
$0.37↓#11069↓0.278.1 years↓
"Whenever this card attacks, reveal the top card of your library. You may cast it without paying its mana cost if its mana value is odd. If you don't cast it, draw a card."
Djinn of Wishes70%
$0.12↓#18716↓0.00↓17.1 years↑
"
, Remove a wish counter from this creature: Reveal the top card of your library. You may play that card without paying its mana cost. If you don't, exile it."
, Remove a wish counter from this creature: Reveal the top card of your library. You may play that card without paying its mana cost. If you don't, exile it."