Leyline of Mutation 
Enchantment
$0.31 #6653 0.33 2.1 years
If this card is in your opening hand, you may begin the game with it on the battlefield.
You may pay 
rather than pay the mana cost for spells you cast.
rather than pay the mana cost for spells you cast.Click a line or tag to filter
Cards similar to Leyline of Mutation 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.
Fist of Suns100%
$5.59↑#4506↑0.54↑22.4 years↑
"You may pay rather than pay the mana cost for spells you cast."
rather than pay the mana cost for spells you cast."
Jodah, Archmage Eternal98%
$0.95↑#57750.95↑8.6 years↑
"You may pay rather than pay the mana cost for spells you cast."
rather than pay the mana cost for spells you cast."