1 Feb 2007
In the Two-Headed Giant format, you still only have to pay once per creature.
1 Feb 2014
Unless some effect explicitly says otherwise, a creature that can't attack you can still attack a planeswalker you control.
18 Jun 2021
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.
18 Jun 2021
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.