Protective Sphere 

Enchantment
{1}, Pay 1 life: Prevent all damage that would be dealt to you this turn by a source of your choice that shares a color with the mana spent on this activation cost. (Colorless mana prevents no damage.)
click a line to search just that ability, click more to combine them
Cards that do something similar 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.
Spatial Binding 88%
$0.27#21700
"Pay 1 life: Until your next upkeep, target permanent can't phase out."
Ethereal Champion 82%
$0.38#28485
"Pay 1 life: Prevent the next 1 damage that would be dealt to this creature this turn."
Liesa, Shroud of Dusk 80%
$0.98#5565
"Rather than pay {2} for each previous time you've cast this spell from the command zone this game, pay 2 life that many times."