Activating this trainer:
If not state otherwise below, press F1 at main menu.
Listen for 'Trainer Activated'.
Press desired hotkey. All hotkeys can be changed on the trainer.

Promo Options:
NumPad7: Unlimited Potions

Trainer Options:
NumPad1: Unlimited Health
NumPad2: Manifest Full
NumPad3: Instant Skill Cooldowns
NumPad4: Weak Enemies
NumPad5: Death Force
NumPad6: Enemies Don't Attack
NumPad7: Unlimited Potions

Editor Options:
Player Stats: Level
Player Stats: XP
Player Stats: Next XP

Notes:

EDITOR OPTIONS

For PLAYER STATS, the values fill in.  Change value then press TAB to modify.  You may have to earn XP to see that the values changed or have effect.

Unlimited Health:
Toggle on to keep health full.

Manifest Full:
Toggle on to keep Manifest Gauge full.

Instant Skill Cooldowns:
Toggle on and skills reset nearly instantly.

Weak Enemies:
Toggle on and most enemies have very low health.

Death Force:
Use with caution!  This powerful option, once toggled on, when you approach enemies you exude a death force that when you approach instantly kills them, and you collect XP.  May set off scripts or kill bosses instantly, so use with caution!

Enemies Don't Attack:
Toggle on and most enemies will not attack.

Unlimited Potions:
Toggle on and when you use potions, you have plenty.