Edit one hour later:

• crown of protection no longer gives health for weapons the player drops
• corrected /mskill-scale and /mcrown-scale values when x10 features are enabled

Edit 2:

• the crown of protection fix made weapons not from chests not heal the player, it should be okay now

Final edit:

• crown of protection no longer errors if you leave the level when a weapon is untouched
• crown of guns works now, kinda (they drop from anything with a corpse instead of just enemies)
• crown of blood shouldn't reduce the rate that traps spawn anymore
• fixed an error where /mcrown would say "CROWN OF ." instead of none/random

I don't have a clever introductory line, so let's just jump in:

• new command: /mpieces
  • change the number of pieces combined for mutations and crowns at any time
• new command: /mpieces-random
  • randomize the piece count of each mutation and crown, with /mpieces' value being the highest possible
• new command: /mskill-scale
  • find out how many times a mutation effect is stacked
• new command: /mcrown-scale
  • find out how many times a crown effect is stacked
• new command: /mtrain
  • force features from blaac's crown train (only does crowns from this mod vs his doing every crown and some cool stuff)
• new command: /mx10
  • force features from MasterLuigi452's mutations x10 (only mutations as they stack normally, none of the creative fun stuff)
• moved a bunch of global variables to GameCont, to help the run function normally if the mod's reloaded
• "fake" mutations are now included in the download instead of being generated by the mod
  • there's a text file (bye bye.txt) also included that will unload all fake mutations (intended for when you unload merge.mod.gml)
• /allowmod permission is no longer required
• the number of vaults you can visit in a run will be 2 instead of 3 when starting with a crown to better emulate vanilla gameplay
• sprites get generated and loaded for use instead of creating tons of vertex buffers and using D3D transforms, improving performance
• skill processing is done differently (don't know how to explain, sorry), improving performance
• strong spirit no longer replenishes two charges the first level after they're all depleted
• real crown objects are used when crown train features are disabled
• rads from crown of hatred don't all spread at the same speed (looks better?)
• improved crown of blood effect to be more like a scaled vanilla crown of blood
• Rebel's passive now works with crown of luck
• crown of luck now rerolls for each stack instead of increasing the 1 HP chance for enemies
• fixed crown of death's death explosion to work with any number of pieces
• crown of death no longer instantly kills you if your max HP goes below 1
• last wish now shows up if no possible mutations are left