Skystreak Engineer
Creature — Human Pilot
Flying
Exhaust — 
: Put two +1/+1 counters on this creature. (Activate each exhaust ability only once.)
Garima was delighted to finally test out her design. The amazing views were a bonus.
Elizabeth Peiró
Aetherdrift (DFT)
• #61Rulings
If an exhaust ability of a permanent is activated, and then that permanent leaves the battlefield and returns to the battlefield, it becomes a new object so its exhaust ability can be activated again.
(wotc • 2025-02-07)
If an ability triggers whenever you activate an exhaust ability, that ability resolves before the exhaust ability resolves.
(wotc • 2025-02-07)
Exhaust abilities can be activated any time you could normally activate an ability.
(wotc • 2025-02-07)
Rulings
If an exhaust ability of a permanent is activated, and then that permanent leaves the battlefield and returns to the battlefield, it becomes a new object so its exhaust ability can be activated again.
(wotc • 2025-02-07)
If an ability triggers whenever you activate an exhaust ability, that ability resolves before the exhaust ability resolves.
(wotc • 2025-02-07)
Exhaust abilities can be activated any time you could normally activate an ability.
(wotc • 2025-02-07)