A new single-level “heaven” branch, reachable by levelporting to a negative level, that is filled with angels guarding the “Holy Scepter”, a new artifact with unspecified properties. There is an exit portal on the level, and the angelic guards are peaceful unless angered or the Scepter is taken. If you steal the Scepter, you can sacrifice it on Moloch’s high altar to get a bad ending to the game.

Portal stones: gray stones which are only useful in pairs (and which only 2 may generate in the whole game). They are used by putting one stone at a location you want to return to later, then later on activating the other one by rubbing it on your hand or something, which opens a temporary magic portal to (or levelports you to) the first stone.

When monsters levelport, they leave behind a magic portal which lasts one or a few turns, which you can use to follow them, to emulate how monsters can follow you when you levelport.

The debug fuzzer, when it levelports, should pick a random level from the entire dungeon rather than using random levelportation logic, since this tends to lead to it bouncing around the upper levels of the Dungeons of Doom rather than actually going anywhere significant and into new branches.

Or to make this a bit more configurable, there should be an additional iflag added that controls this levelporting behavior which can be enabled in a debugger similar to how iflags.debug_fuzzer is.

If you controlled levelport to level -10 or higher as an infidel, you don’t get admitted into heaven; they reject you and possibly shove you out to fall to your death on the ground.

When you controlled levelport to level 0, Nowhere, monsters that normally follow you through a levelport will do the same here (because they don’t know where you’re going). This will kill all of them and make them cease to exist, the same as you, but you can survive as usual with an amulet of life saving. This effectively allows you to controlled levelport to 0 to dispose of any monsters that would follow you.

Note: because it depends on levelporting to level 0, it won’t work when carrying the Amulet or in the End Game.

You can’t levelport down past a demon lord lair if the demon lord is alive and well on that level. (If it hasn’t been generated yet, it’s assumed that they are.)

You cannot levelport down past a demon lord’s lair level until the demon lord is killed, appeased with a bribe, or otherwise gotten rid of. Attempts to levelport past it will just land you on their lair level instead. However, you can still go below the level by way of the stairs, a hole, or a trapdoor in the lair.

Only allow levelporting to go out of a branch in the “direction” it rejoins the parent branch. The main reason for this is so that anything levelporting out of Vlad’s Tower cannot end up on levels above the tower; only on levels lower than it.

Levelporting to a level you have never visited may fail and levelport you randomly (except in wizard mode). If you have previously visited the level, levelporting will place you in a spot that has been previously mapped.

Whenever a monster tries to read a scroll of teleportation and level teleports to the current level (“foo shudders for a moment”), you are prompted to call the scroll.

New artifact The Silver Shoes, silver low boots that levelport you when invoked. They are the shoes worn by Dorothy in The Wonderful Wizard of Oz.

The scroll of teleportation now levelports when blessed and limits your possible teleport destinations to a small radius when cursed. Confused teleport gives you a single controlled horizontal teleport.

Dropping items into a sink has a 1% chance of sucking you in and levelporting you randomly.

Add restrictions on levelporting for various roles to help differentiate them.

Level teleport in the Quest never goes down unless you have beaten the nemesis and never goes up unless you have shown the artifact to your quest leader.

A Word of Recall spell, which after a sizeable delay (3d5 or 5d6 turns) levelports you to one of several possible locations: Minetown, dungeon level 1, the Oracle, the Castle, the Quest. You will not travel anywhere you have not already visited. Does not work if you have the Amulet.