For those that didn't "accidentally" stab a guy and found out, the way to obtain incredibilities is simply to kill a shopkeeper.

Some things to keep in mind:

-Shopkeepers only appear after your first victory.
-Once you kill a shopkeeper, future shops of the same type will have no useful items in them for the remainder of that run.
-The current shop selection is replaced by incredibilities, so if there's only 1 item left you'll only get 1 incredibility to pick.

"Double damage at full health, half damage otherwise. Live strong, or die weak."


100% Health = Double your damage.
99% or less Health = Cut your damage in half.

"More rewards will appear."


Triple the chance to obtain bonus loot after you win a room.

"All the power in the world, but at what cost?"


+200 Max Energy
+50 Energy regen per second
Max Shields set to 1.
Max Health set to 1.

"Many more enemy spawns for you to learn from."


Double the amount of non-boss regular enemies spawned.

"It's all happening so fast now."


Double the speed of enemies and their attacks.

"Go where you please.."


Able to freely walk through transparent blocks and one-way arrows.

"Consume all to make us stronger."


Replace all rewards from rooms and chests with Healthshards.

Every time you collect a certain number of Healthshards, you get +1 Max Health.
(8 shards are needed on Normal difficulty.)

"They're so small, much more dangerous, but highly educational!"


Reduce the size of enemies by half.
Increase the value of XP pickups by 50%.

"All items will be attracted to you."


When you enter a room, all items on the ground and chests will start moving toward your mech, even going over walls to reach you.
Warning: This will also affect shop items.

"Fewer enemies will stand before you, but how will you get stronger?"


Cut the amount of non-boss regular enemies spawned by half.
Reduce the value of XP pickups by 25%.

"Will give you double damage, and the ability to avoid hazard-related damage, but at what cost?"


Double your damage.
Immunity to hazard and explosive damage.
(Includes spikes, mines, alien eggs, wall lasers, turrets, shrapnels from destroyed blue barricades.)
When entering a room, your mech is phased out (aka invincible) for 3 seconds.

Max Shields set to 0.
Max Health set to 1.
Current missile reserve set to 0. (Max missile capacity remains unchanged.)

"Move and flow... sense them coming."


While you move, the enemies and their attacks are slowed down to half speed.
Also, while moving your firerate is increased by 25%.