This land enters tapped unless you control a Forest.
{T}: Add {G}.
{2}{G}{G}, {T}: Add six {G}. Spend this mana only to cast creature spells or activate abilities of creatures.
Without Garenbrig's strength, the realm would succumb to the wilds.
Legalities
tlrlegal
duellegal
brawllegal
pennylegal
PreDH
Rulings · 3
wotc
Although the common lands have basic land types, they aren't basic lands.
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.
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.
Notes
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