Shield of the Oversoul 

Enchantment — Aura
$1.85 #4585 0.09 18.5 years
Enchant creature
As long as enchanted creature is green, it gets +1/+1 and has indestructible. (Damage and effects that say "destroy" don't destroy it. If its toughness is 0 or less, it still dies.)
As long as enchanted creature is white, it gets +1/+1 and has flying.
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Cards similar to Shield of the Oversoul 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.
Jeskai Runemark84%
$0.03↓#24342↓0.0611.7 years↓
"Enchanted creature has flying as long as you control a red or white permanent."
+1 more matching line
Favor of the Overbeing84%
$0.39↓#8213↓0.1418.2 years
"As long as enchanted creature is blue, it gets +1/+1 and has flying."
+2 more matching lines
Arcane Flight80%
$0.13↓#13343↓0.23↑8.5 years↓
"Enchanted creature gets +1/+1 and has flying."
+1 more matching line
Spectral Flight80%
$0.16↓#19933↓0.0615.1 years↓
"Enchanted creature gets +2/+2 and has flying."
+1 more matching line
Drake Umbra80%
$0.19↓#15077↓0.19↑16.5 years↓
"Enchanted creature gets +3/+3 and has flying."
+1 more matching line