The Trinity is a Tremodeboss. It is currently the penultimate boss of the Tremor mod. After beating the boss Angelite and Collapsium Ore will spawn, and the appearances of which will be announced with two messages: "This world has been enlightened with Angelite!" for Angelite and "This world has been attacked with Collapsium!" for Collapsium. The Undertaker NPC can settle in after The Trinity has been defeated.
Despite being known as a boss, they are not counted as a boss, which means that other music can overlap with their theme, or the AlchemistNPC Mod item "The Ban Hammer" (Not to be confused with the Hope's drop} which kills non-boss enemies also works against them.