Castle Locthwain enters tapped unless you control a Swamp. {T}: Add {B}. {1}{B}{B}, {T}: Draw a card, then you lose life equal to the number of cards in your hand.
2019-10-04
Although the common lands have basic land types, they aren't basic lands.
2019-10-04
No player may take actions between the time you draw a card and the time you lose life.
2019-10-04
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.