Fourth Edition Foreign Black Border · #19
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At the beginning of your upkeep, sacrifice this enchantment unless you pay {W}{W}. All Mountains are Plains.
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Conversion (4BB-19) is an uncommon white enchantment from Fourth Edition Foreign Black Border. It makes all Mountains become Plains and requires {W}{W} at the beginning of your upkeep or you must sacrifice it. The card creates a continuous replacement effect that changes land types, which can disrupt opponents' mana production and color access.
Catalog pricing data as of 28 Apr 2026, 13:37
