The Beacon of Kahless 

Legendary Artifact
£0.97 #28293 0.0 years
Battlefront —
: Choose a color. Add an amount of mana of that color equal to the number of opponents you attacked this turn.
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Cards similar to The Beacon of Kahless 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.
Pyramid of the Pantheon77%
£0.24↓#13885↑0.009.5 years↑
"
,
: Add one mana of any color. Put a brick counter on this artifact."
Astral Cornucopia74%
£0.21↓#1300↑0.0612.8 years↑
"
: Choose a color. Add one mana of that color for each charge counter on this artifact."
White Lotus Tile72%
£3.39↑#3779↑0.311.0 years
"
: Add X mana of any one color, where X is the greatest number of creatures you control that have a creature type in common."
The Eternity Elevator72%
£1.34↑#1467↑0.121.3 years↑
"
: Add X mana of any one color, where X is the number of charge counters on this card."
Empowered Autogenerator72%
£0.16↓#3973↑0.107.2 years↑
"
: Put a charge counter on this artifact. Add X mana of any one color, where X is the number of charge counters on this artifact."
Nyx Lotus71%
£3.39↑#1813↑0.446.8 years↑
"
: Choose a color. Add an amount of mana of that color equal to your devotion to that color."
Prismatic Geoscope70%
£0.83↓#17009↑0.0710.0 years↑
"
: Add X mana in any combination of colors, where X is the number of basic land types among lands you control."
Coalition Relic70%
£0.15↓#3413↑0.0619.5 years↑
"At the beginning of your first main phase, remove all charge counters from this artifact. Add one mana of any color for each charge counter removed this way."
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