Sacred Foundry

Land — Mountain Plains

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As Sacred Foundry enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.

2018-10-05:
Unlike most dual lands, this land has two basic land types. It’s not basic, so cards such as District Guide can’t find it, but it does have the appropriate land types for effects such as that of Drowned Catacomb (from the Ixalan set).
2018-10-05:
If an effect puts this land onto the battlefield tapped, you may pay 2 life, but it still enters tapped.