Polymorph traps have some percentage chance of disappearing whenever they polymorph anything (some people have suggested it always disappears). This is better for symmetry and means players might be able to deliberately polymorph themselves multiple times, but can’t abuse it on behalf of their pet.

The player can cast destroy armor at other monsters at melee range.

If Mjollnir is thrown and would hit a valkyrie player monster wearing gauntlets of power, they catch it instead.