Historian's Boon 
Enchantment
$2.08 #6578 0.13 4.0 years
Whenever this enchantment or another nontoken enchantment you control enters, create a 1/1 white Soldier creature token.
Whenever the final chapter ability of a Saga you control triggers, create a 4/4 white Angel creature token with flying and vigilance.
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Cards similar to Historian's Boon 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.
Gremlin Tamer79%
$0.29↓#8117↓0.151.9 years↓
"Whenever an enchantment you control enters and whenever you fully unlock a Room, create a 1/1 red Gremlin creature token."
Setessan Skirmisher79%
$0.08↓#28021↓0.00↓6.6 years↑
"Whenever an enchantment you control enters, this creature gets +1/+1 until end of turn."
Ajani's Chosen78%
$0.28↓#3992↑0.1713.1 years↑
"Whenever an enchantment you control enters, create a 2/2 white Cat creature token. If that enchantment is an Aura, you may attach it to the token."
Nexus Wardens78%
$0.19↓#16902↓0.47↑6.6 years↑
"Whenever an enchantment you control enters, you gain 2 life."
Oakheart Dryads78%
$0.09↓#23958↓0.2012.3 years↑
"Whenever this creature or another enchantment you control enters, target creature gets +1/+1 until end of turn."
Ondu Spiritdancer77%
$12.26↑#1595↑0.41↑3.1 years
"Whenever an enchantment you control enters, you may create a token that's a copy of it. Do this only once each turn."
Ghostly Dancers76%
$0.37↓#3685↑0.101.9 years↓
"Whenever an enchantment you control enters and whenever you fully unlock a Room, create a 3/1 white Spirit creature token with flying."
Archon of Sun's Grace76%
$0.34↓#1193↑0.24↑6.6 years↑
"Whenever an enchantment you control enters, create a 2/2 white Pegasus creature token with flying."
Oath of the Ancient Wood76%
$0.23↓#19682↓0.0713.1 years↑
"Whenever this enchantment or another enchantment you control enters, you may put a +1/+1 counter on target creature."
Go-Shintai of Life's Origin74%
$7.70↑#5067↑0.55↑4.5 years
"Whenever this card or another nontoken Shrine you control enters, create a 1/1 colorless Shrine enchantment creature token."
Pious Wayfarer74%
$0.18↓#23856↓0.136.6 years↑
"Whenever an enchantment you control enters, target creature gets +1/+1 until end of turn."
Underworld Coinsmith72%
$0.29↓#9478↓0.0812.3 years↑
"Whenever this creature or another enchantment you control enters, you gain 1 life."
Erratic Apparition72%
$0.12↓#21733↓0.071.9 years↓
"Whenever an enchantment you control enters and whenever you fully unlock a Room, this creature gets +1/+1 until end of turn."
+1 more matching line
Boon of the Spirit Realm71%
$6.72↑#4455↑0.33↑3.1 years
"Whenever this enchantment or another enchantment you control enters, put a blessing counter on this enchantment."
Humbler of Mortals71%
$0.16↓#19357↓0.29↑12.3 years↑
"Whenever this creature or another enchantment you control enters, creatures you control gain trample until end of turn."
Triton Waverider70%
$0.06↓#28867↓0.33↑6.6 years↑
"Whenever an enchantment you control enters, this creature gains flying until end of turn."
Steelclad Spirit70%
$0.11↓#29011↓0.47↑4.8 years
"Whenever an enchantment you control enters, this creature can attack this turn as though it didn't have defender."
Grim Guardian70%
$0.36↓#3238↑0.2212.3 years↑
"Whenever this creature or another enchantment you control enters, each opponent loses 1 life."
Eidolon of Blossoms70%
$2.47↑#889↑0.39↑12.4 years↑
"Whenever this creature or another enchantment you control enters, draw a card."
Luminous Angel70%
$0.69↓#22621↓0.27↑22.9 years↑
"At the beginning of your upkeep, you may create a 1/1 white Spirit creature token with flying."