Mana Chains 
Enchantment — Aura
$0.22 #23413 0.41 29.2 years
Enchant creature
Enchanted creature has "Cumulative upkeep 
." (At the beginning of its controller's upkeep, that player puts an age counter on it, then sacrifices it unless they pay its upkeep cost for each age counter on it.)
." (At the beginning of its controller's upkeep, that player puts an age counter on it, then sacrifices it unless they pay its upkeep cost for each age counter on it.)Click a line or tag to filter
Cards similar to Mana Chains 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.
Decomposition88%
$0.13↓#30519↓0.55↑29.9 years
"Enchanted creature has "Cumulative upkeep—Pay 1 life.""
Slow Motion88%
$0.19↓#237020.4427.6 years↓
"Enchant creature"
Pendrell Flux80%
$0.13↓#268870.3627.9 years↓
"Enchanted creature has "At the beginning of your upkeep, sacrifice this creature unless you pay its mana cost.""
+1 more matching line
Inevitable End78%
$0.17↓#194060.62↑6.6 years↓
"Enchanted creature has "At the beginning of your upkeep, sacrifice a creature.""
+1 more matching line
Sporogenic Infection78%
$0.24↑#12222↑0.15↓1.9 years↓
"Enchant creature"
Parasitic Implant78%
$0.11↓#215930.4315.3 years↓
"Enchant creature"
Destructive Urge76%
$0.54↑#17661↑1.03↑27.9 years↓
"Enchant creature"
Aura Flux72%
$0.23↑#245231.14↑27.6 years↓
"Other enchantments have "At the beginning of your upkeep, sacrifice this enchantment unless you pay 
.""
.""
Custody Battle71%
$1.14↑#12181↑0.75↑23.9 years↓
"Enchant creature"
Morgul-Knife Wound70%
$0.16↓#14214↑0.29↓3.2 years↓
"Enchant creature"