Endless Potion Effects
Most potion effects in Vanilla and in Randomness have an Endless variant.
This gives you the effect for ∞ at level 1. (no amplification)
Drinking the endless effect consumes the item.
The only ways to lose the effect are with cures (like milk) or by dying... or waiting for 999999999 ticks.
Crafting
First, you need to craft a Endless Effect Base. 
With 4 Tinted Glass, 4 Warped Wart, and 1 Infinity Star .
Next, you brew your desired potion effect's ingredient into the Endless Effect Base.
For example: the ingredient for a Night Vision potion is a Golden Carrot - So by brewing a Golden Carrot into an Endless Effect Base, you get an Endless Night Vision Effect.
Every endless effect follows this brewing pattern.
Potion inversions with Fermented Spider Eyes also apply to Endless Effects.
Example: inverting Speed into Slowness also works with Endless Effects.
Reminder: Randomness adds craftable potions to some Vanilla effects that don't normaly have a potion. (like Resistance, Haste...) So the crafting recipe for their Endless Effects match the Randomness-added-recipies for their potions. See the full list of new potions for Vanilla effects.
Randomness also adds new potion inversions with Fermented Spider Eyes that also apply to Endless Effects.
List of every Endless Effect
Endless Effects with Vanilla potion equivalents:
- Regeneration
- Speed
- Jump Boost
- Invisibility
- Weakness
- Water Breathing
- Slow Falling
- Fire Resistance
- Night Vision
- Poison
- Strength
Endless Effects of Vanilla effects with potion recipies added by Randomness:
- Wither
- Glowing
- Conduit Power
- Haste
- Resistance
- Nausea
Endless Effects of Randomness effects with recipies
- Withering Touch
- Megacake Cooldown
- Streggnth
- Streggnthsplosive
- Healthy
- Fall Resistance
- Lethal Poison
Endless Effects of Randomness effects without recipies
- Creative Shock
- True Lethal Poison