Does Torpor Orb stop triggered abilities that trigger when a creature dies?

Torpor Orb reads: 'Creatures entering the battlefield don't cause abilities to trigger.' This is a narrow suppression effect — it applies exclusively to triggered abilities whose trigger condition is a creature entering the battlefield (i.e., 'enters the battlefield' triggers, also called ETB triggers). It has no effect on any other category of triggered ability.

When a creature dies (moves from the battlefield to the graveyard), that event is governed by a separate trigger condition: 'when [this creature] dies' or 'whenever a creature dies.' These triggers fire as normal even while Torpor Orb is on the battlefield, because Torpor Orb's text simply does not cover them. (CR 603.6 governs how and when triggered abilities trigger; Torpor Orb creates a static ability that modifies only the subset involving creatures entering the battlefield.)

This distinction matters for many cards. For example, if you control Torpor Orb and your opponent's Kokusho, the Evening Star dies, Kokusho's triggered ability ('when Kokusho dies, each opponent loses 5 life...') still triggers and resolves normally. Torpor Orb does nothing to stop it.

By contrast, if your opponent plays a Lotus Cobra, its 'whenever a land enters the battlefield' trigger is also unaffected — Torpor Orb only suppresses abilities triggered by creatures entering, not lands. And if the opponent plays a creature with an ETB ability like Reclamation Sage, that ETB trigger would be suppressed by Torpor Orb.

In summary: Torpor Orb is limited to ETB triggers caused by creatures. Death triggers, sacrifice triggers, and all other triggered abilities continue to function as normal under CR 603.1 and the card's own text.