Castle Locthwain
Land
This land enters tapped unless you control a Swamp.
: Add 
.
, : Draw a card, then you lose life equal to the number of cards in your hand.
Without Locthwain's persistence, the realm would stagnate and die.
Illustrated by
Throne of Eldraine#241RareEnglishLegality
Rulings
Oct 4, 2019
No player may take actions between the time you draw a card and the time you lose life.
Oct 4, 2019
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.
Oct 4, 2019
Although the common lands have basic land types, they aren't basic lands.