Castle Garenbrig enters tapped unless you control a Forest. : Add . , : Add six . Spend this mana only to cast creature spells or activate abilities of creatures.
Although the common lands have basic land types, they aren't basic lands.
04-10-2019
wotc
The mana generated by Castle Garenbrig's last ability can't be spent to activate abilities of creature cards that aren't on the battlefield.
04-10-2019
wotc
Once the common lands (such as Mystic Sanctuary) enter the battlefield tapped, there's no way to untap them with a spell or ability to make their last ability trigger.
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.
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Adam Paquette2019-10-04
