Conversion (Retro) [30th Anniversary Edition] Dominaria destroy target artifact or enchantment

destroy target artifact or enchantment an opponent controls

Then if there are fifteen or more artifact cards in your graveyard

Hero of Akros and at least two other creatures attacked this combat

Set: The Brothers' War Type: Sorcery Rarity: Mythic Cost: {X}{G}{G} Create X 1/1 green Forest Dryad land creature tokens

Set: 30th Anniversary Edition Type: Sorcery Rarity: Common Cost: {2}{G} Destroy all enchantments

Conversion (Retro) [30th Anniversary Edition] Dominaria destroy target artifact or enchantmentSet: 30th Anniversary Edition Type: Enchantment Rarity: Uncommon Cost: {2}{W}{W} At the beginning of your upkeep, sacrifice Conversion unless you pay {W}{W}. All Mountains are Plains.