The Golden Palm (3.5e Equipment)
From D&D Wiki
The Golden Palm: The original was said to be crafted from Garl Glittergold himself, and since then duplicates have been made all over. This heavy mace is a favorite with clerics who busy themselves with merchant work.
The mace is a brass shaft with brown leather wrappings around the handle, with a heavy dull orange brass fist clenched tightly. The Golden Palm is a +1 heavy mace, dealing 1d8 damage for medium creatures and 20/x2 critical. The size automatically adjusts for any creature from Small to Large. In addition 1/day a command word Gilden can be spoken as a standard action, and the fist opens, revealing a single golden coin of currency. It is a real coin, non-magical and permanent, and may be spent or used. Only one coin can be made per day, and once removed or dropped from the fist the hand automatically closes.