Reaper's Talisman
Artifact — Equipment
Whenever equipped creature attacks, it gains deathtouch until end of turn.
Whenever equipped creature attacks alone, defending player loses 2 life and you gain 2 life.
Equip 
(: Attach to target creature you control. Equip only as a sorcery.)
Olena Richards
The List (PLST)
• #AFR-117Rulings
When the equipped creature attacks alone, it causes both abilities to trigger.
(wotc • 2021-07-23)
Rulings
When the equipped creature attacks alone, it causes both abilities to trigger.
(wotc • 2021-07-23)