Aven Trailblazer
Creature — Bird Soldier
Flying
Domain — Aven Trailblazer's toughness is equal to the number of basic land types among lands you control.
"The bird wore the form of a man, bereft of filigree. Why do the Texts not speak of it?" —Belator of Esper
Chris Rahn
Conflux (CON)
• #4Rulings
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 • 2021-06-18)
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 • 2021-06-18)
Aven Trailblazer's second ability is a "characteristic-defining ability." It applies at all times in all zones.
(wotc • 2009-02-01)
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 • 2021-06-18)
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 • 2021-06-18)
Aven Trailblazer's second ability is a "characteristic-defining ability." It applies at all times in all zones.
(wotc • 2009-02-01)