Oscura

Oscura centers on the idea of obscurity. Potion Obscurity is brewed by combining Oscura Shards in a Thick Potions Brewing Stand, and the potions give the drinker about 3 to 8 minutes of effect. Obscurity Charms hold 5 uses and then permanently shatter, so the effect is limited by the number of charges rather than by time.

The mod adds a dagger that can be enchanted at an Enchanting Table. Its Backwarp enchantment lets the wielder teleport behind a target, and the Impunity enchantment raises attack damage while the player is obscured. Broken gear can be repaired with shards. An accessibility option makes the player gaze back at the target's skull, which the author describes as a convenience. Oscura requires StrawberryLib, and the mod runs on client and server, so the server and every player need it.