Titan Hunter

Text:

At the beginning of each player's end step, if no creatures died this turn, Titan Hunter deals 4 damage to that player.
, Sacrifice a creature: You gain 4 life.

Rulings:

• 4/17/2020 Titan Hunter’s triggered ability triggers at the beginning of each player’s end step, including yours, if no creatures died during that turn.
• 4/17/2020 If a creature dies while Titan Hunter’s triggered ability is on the stack, Titan Hunter won’t deal damage to that player.
• 4/17/2020 You can sacrifice Titan Hunter to pay the cost of its activated ability.