Elas il-Kor, Sadistic Pilgrim

• WOTC Official Reminder Textofficial rules
  Deathtouch — Any amount of damage this deals to a creature is enough to destroy it.

• WWizards of the Coast2022-09-09
  Official Ruling
  If one or more other creatures you control die at the same time that Elas il-Kor dies, its last ability triggers for each of those other creatures.
• WWizards of the Coast2022-09-09
  Official Ruling
  If one or more other creatures enter the battlefield under your control at the same time that Elas il-Kor enters the battlefield, its second ability will trigger for each of those other creatures.
• WWizards of the Coast2022-09-09
  Official Ruling
  In a Two-Headed Giant game, Elas il-Kor’s last ability causes the opposing team to lose 2 life.

Rulings via Scryfall