Draco

{16} · Artifact Creature — Dragon

Domain — This spell costs {2} less to cast for each basic land type among lands you control. Flying Domain — At the beginning of your upkeep, sacrifice this creature unless you pay {10}. This cost is reduced by {2} for each basic land type among lands you control.

Motor: se resuelve a mano

Rulings (2)

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.
Wizards of the Coast · 2021-06-18
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.
Wizards of the Coast · 2021-06-18