Envoy of the Ancestors
Creature — Human Cleric
Outlast (, 
: Put a +1/+1 counter on this creature. Outlast only as a sorcery.)
Modified creatures you control have lifelink. (Equipment, Auras you control, and counters are modifications.)
"No Abzan has ever stood alone."
Irina Nordsol
Modern Horizons 3 (MH3)
• #23Rulings
A creature that is equipped is considered modified no matter who controls the Equipment that's attached to it.
(wotc • 2024-06-07)
The cost to activate a creature's outlast ability includes the tap symbol ({T}). Envoy of the Ancestors's outlast ability can't be activated unless it has been under your control continuously since the beginning of your turn.
(wotc • 2024-06-07)
A creature with a counter on it is considered modified no matter what kind of counter it is or which player put it on that creature.
(wotc • 2024-06-07)
An Aura controlled by another player does not cause a creature you control to be modified.
(wotc • 2024-06-07)
Only creatures can be modified. If a modified creature stops being a creature, it is no longer considered modified.
(wotc • 2024-06-07)
Rulings
A creature that is equipped is considered modified no matter who controls the Equipment that's attached to it.
(wotc • 2024-06-07)
The cost to activate a creature's outlast ability includes the tap symbol ({T}). Envoy of the Ancestors's outlast ability can't be activated unless it has been under your control continuously since the beginning of your turn.
(wotc • 2024-06-07)
A creature with a counter on it is considered modified no matter what kind of counter it is or which player put it on that creature.
(wotc • 2024-06-07)
An Aura controlled by another player does not cause a creature you control to be modified.
(wotc • 2024-06-07)
Only creatures can be modified. If a modified creature stops being a creature, it is no longer considered modified.
(wotc • 2024-06-07)