Name:Thriving Heath
ManaCost:no cost
Types:Land
K:CARDNAME enters the battlefield tapped.
K:ETBReplacement:Other:ChooseColor
SVar:ChooseColor:DB$ ChooseColor | Defined$ You | Exclude$ white | AILogic$ MostProminentInComputerDeck | SpellDescription$ As CARDNAME enters the battlefield, choose a color other than white.
A:AB$ Mana | Cost$ T | Produced$ W | SpellDescription$ Add {W}.
A:AB$ Mana | Cost$ T | Produced$ Chosen | SpellDescription$ Add one mana of the chosen color.
Oracle:Thriving Heath enters the battlefield tapped.\nAs Thriving Heath enters the battlefield, choose a color other than white.\n{T}: Add {W} or one mana of the chosen color.