Name:Mana Reflection
ManaCost:4 G G
Types:Enchantment
R:Event$ ProduceMana | ActiveZones$ Battlefield | ValidPlayer$ You | ValidCard$ Permanent | ValidAbility$ Activated.hasTapCost | ReplaceWith$ ProduceTwice | Description$ If you tap a permanent for mana, it produces twice as much of that mana instead.
SVar:ProduceTwice:DB$ ReplaceMana | ReplaceAmount$ 2
Oracle:If you tap a permanent for mana, it produces twice as much of that mana instead.