Conversion

#16

Enchantment

At the beginning of your upkeep, sacrifice this enchantment unless you pay . All Mountains are Plains.

Legalities

standardpioneermodernlegacyvintagepaupercommanderbrawl

Rulings (2)

2004-10-04 The Conversion effect is a continuous effect. There is no chance to tap a just-played mountain for red mana before it becomes a plains.
2006-10-15 Will not add or remove the supertype snow to or from a land.