Sulfur Cube Mob + Anti-Invisibility Potion Idea

I have an idea for a new mob called the Sulfur Cube.

The Sulfur Cube would be similar to a slime, but made from toxic sulfur and would have special interactions with potions.

Main Feature:

• If a player uses an Invisibility Potion, the Sulfur Cube can still see the player.
• The Sulfur Cube would be able to detect invisible players, so invisibility would not fully work against it.

New Item Idea: Milk Splash Potion

• A new potion called Splash Milk Potion could be added.
• If thrown on a player, it removes negative effects and could also help remove special effects like being detected by the Sulfur Cube.

Purpose:
This would make invisibility less overpowered in some situations and add a new challenging mob with unique mechanics.