Since the activated ability doesn’t have a tap symbol in its cost, you can tap creatures (including Gilt-Leaf Archdruid itself) that haven’t been under your control since your most recent turn began to pay the cost.
01-04-2008
wotc
The second ability’s effect has no duration. You retain control of those lands until the game ends or until some other effect causes them to change control.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.