Allow wielding some types of traditional magical implements to reduce spell failure rates:

• Wielding a quarterstaff confers the same benefit as wearing a robe but does not stack with it.
• Wielding a wand of nothing confers the same benefit as wearing a robe but does not stack with it.
• Wielding an identified wand which matches a spell (wand of light -> spell of light, wand of death -> finger of death, etc) drastically reduces your failure rate when casting it. Perhaps casting the spell while wielding the matching unidentified wand should identify the wand.

Scroll of recall: a scroll that works like a magic whistle but with more varied effects.

• Uncursed: works identically to a magic whistle, summoning pets on the level to your side.
• Blessed: summons pets from anywhere in the dungeon to your side.
• Cursed: summons hostiles to your side (unclear if this is from anywhere in the dungeon or just the current level).
• Confused: summons objects to your side.

The “You hear someone cursing shoplifters” message replaces “someone” with the name of a known alive shopkeeper on the level.