Enchant Forest
As Utopia Sprawl enters the battlefield, choose a color.
Whenever enchanted Forest is tapped for mana, its controller adds an additional one mana of the chosen color.
When an opponent casts a spell, if Veiled Sentry is an enchantment, Veiled Sentry becomes an Illusion creature with power and toughness each equal to that spell's converted mana cost.
: This card's name becomes the card name of your choice. Activate this ability anywhere, anytime.
: This card's flavor text becomes the flavor text of your choice. (This ability doesn't work because it's flavor text, not rules text (but neither does this reminder text, so you figure it out).)