Rulings
If an unblocked attacking Ninja you control leaves combat (most likely because the combat phase has ended), it no longer has lifelink.
(wotc • 2019-06-14)
Throatseeker’s effect applies only after blockers have been declared. Before then, attacking creatures are neither blocked nor unblocked.
(wotc • 2019-06-14)
Rulings
If an unblocked attacking Ninja you control leaves combat (most likely because the combat phase has ended), it no longer has lifelink.
(wotc • 2019-06-14)
Throatseeker’s effect applies only after blockers have been declared. Before then, attacking creatures are neither blocked nor unblocked.
(wotc • 2019-06-14)