Dragonstone

Dragonstone enters the battlefield tapped.
If a spell or ability causes you to discard
Dragonstone, put it onto the battlefield instead
of putting it into your graveyard.
{t}: Add {b} or {r}.
The Targaryen resided for more than a century at Dragonstone on the island of the same name, until
Aegon began the first of the Wars of Conquest.