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Sorcery
Domain — Each creature gets -X/-X until end of turn, where X is 1 plus the number of basic land types among lands you control.
Windgrace's gladehunters hibernate in the quagmires of Urborg until the scent of Phyrexian technology awakens their hunger.
Nino Is
Dominaria United (DMU)
• #91Rulings
The basic land types are Plains, Island, Swamp, Mountain, and Forest. Land types other than basic land types (such as Desert) don’t contribute to domain abilities.
(wotc • 2022-09-09)
Domain abilities count the number of basic land types among lands you control, not how many lands you control or how many of any type.
(wotc • 2022-09-09)
Rulings
The basic land types are Plains, Island, Swamp, Mountain, and Forest. Land types other than basic land types (such as Desert) don’t contribute to domain abilities.
(wotc • 2022-09-09)
Domain abilities count the number of basic land types among lands you control, not how many lands you control or how many of any type.
(wotc • 2022-09-09)