Beastmaster's Magemark 

Enchantment — Aura
$0.12 #22361 0.27 20.7 years
Enchant creature
Creatures you control that are enchanted get +1/+1.
Whenever a creature you control that's enchanted becomes blocked, it gets +1/+1 until end of turn for each creature blocking it.
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Cards similar to Beastmaster's Magemark 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.
Syr Armont, the Redeemer87%
$0.14↑#181530.13↓3.1 years↓
"Enchanted creatures you control get +1/+1."
Guardian's Magemark86%
$0.23↑#240950.00↓21.2 years
"Creatures you control that are enchanted get +1/+1."
Necromancer's Magemark84%
$0.21↑#234530.00↓20.7 years
"Creatures you control that are enchanted get +1/+1."
Infiltrator's Magemark80%
$0.17↑#184440.13↓21.2 years
"Creatures you control that are enchanted get +1/+1 and can't be blocked except by creatures with defender."
Fencer's Magemark80%
$0.09↓#258270.3120.7 years
"Creatures you control that are enchanted get +1/+1 and have first strike."
+1 more matching line
General Marhault Elsdragon78%
$0.31↑#8337↑0.11↓4.1 years↓
"Whenever a creature you control becomes blocked, it gets +3/+3 until end of turn for each creature blocking it."
Berserk Murlodont78%
$0.14↑#27836↓0.12↓23.7 years↑
"Whenever a Beast becomes blocked, it gets +1/+1 until end of turn for each creature blocking it."
Kongming, "Sleeping Dragon"77%
$0.18↑#181030.10↓27.5 years↑
"Other creatures you control get +1/+1."
Glory of Warfare75%
$0.67↑#16767↑0.12↓17.5 years↓
"During your turn, creatures you control get +2/+0."