Opal Acrolith 

Enchantment
$0.26 #30433 0.29 27.9 years
Whenever an opponent casts a creature spell, if this permanent is an enchantment, it becomes a 2/4 Soldier creature.
Click a line or tag to filter
Cards similar to Opal Acrolith 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.
Opal Caryatid100%
$0.11↓#305350.00↓27.9 years
"When an opponent casts a creature spell, if this permanent is an enchantment, it becomes a 2/2 Soldier creature."
Hidden Ancients94%
$0.23↓#275190.12↓27.9 years
"When an opponent casts an enchantment spell, if this permanent is an enchantment, it becomes a 5/5 Treefolk creature."
Opal Gargoyle94%
$0.16↓#303630.07↓27.9 years
"When an opponent casts a creature spell, if this permanent is an enchantment, it becomes a 2/2 Gargoyle creature with flying."
Opal Champion92%
$0.14↓#305820.44↑27.6 years
"When an opponent casts a creature spell, if this permanent is an enchantment, it becomes a 3/3 Knight creature with first strike."
Hidden Gibbons91%
$11.67↑#18930↑0.3827.6 years
"When an opponent casts an instant spell, if this permanent is an enchantment, it becomes a 4/4 Ape creature."
Veil of Birds91%
$0.15↓#283360.3327.9 years
"When an opponent casts a spell, if this permanent is an enchantment, it becomes a 1/1 Bird creature with flying."
Opal Archangel90%
$2.10↑#294730.53↑27.9 years
"When an opponent casts a creature spell, if this permanent is an enchantment, it becomes a 5/5 Angel creature with flying and vigilance."
Ride the Shoopuf88%
$0.32↑#3653↑0.201.2 years↓
"

: This enchantment becomes a 7/7 Beast creature in addition to its other types."
Hidden Spider88%
$0.29↑#20701↑0.14↓27.9 years
"When an opponent casts a creature spell with flying, if this permanent is an enchantment, it becomes a 3/5 Spider creature with reach."
Veiled Sentry88%
$0.25↓#283650.1927.9 years
"When an opponent casts a spell, if this permanent is an enchantment, it becomes an Illusion creature with power and toughness each equal to that spell's mana value."
Opal Titan87%
$0.47↑#298210.2727.9 years
"When an opponent casts a creature spell, if this permanent is an enchantment, it becomes a 4/4 Giant creature with protection from each of that spell's colors."
Opal Guardian86%
$0.18↓#304980.00↓19.9 years↓
"When an opponent casts a creature spell, if this permanent is an enchantment, this enchantment becomes a 3/4 Gargoyle creature with flying and protection from red."
Veiled Apparition86%
$0.18↓#315440.2927.9 years
"When an opponent casts a spell, if this permanent is an enchantment, it becomes a 3/3 Illusion creature with flying and "At the beginning of your upkeep, sacrifice this creature unless you pay 
.""
Hidden Guerrillas86%
$0.37↑#259850.07↓27.9 years
"When an opponent casts an artifact spell, if this permanent is an enchantment, it becomes a 5/3 Soldier creature with trample."
Veiled Serpent84%
$0.06↓#279350.05↓27.9 years
"When an opponent casts a spell, if this permanent is an enchantment, it becomes a 4/4 Serpent creature with "This creature can't attack unless defending player controls an Island.""
Hidden Stag80%
$0.46↑#295480.53↑27.9 years
"Whenever an opponent plays a land, if this permanent is an enchantment, it becomes a 3/2 Elk Beast creature."
+1 more matching line
Lurking Jackals80%
$0.19↓#318210.00↓27.2 years
"When an opponent has 10 or less life, if this permanent is an enchantment, it becomes a 3/2 Jackal creature."
Hidden Predators80%
$0.48↑#278480.2927.9 years
"When an opponent controls a creature with power 4 or greater, if this permanent is an enchantment, it becomes a 4/4 Beast creature."
Hidden Herd78%
$0.45↑#283500.2227.9 years
"When an opponent plays a nonbasic land, if this permanent is an enchantment, it becomes a 3/3 Beast creature."