Mace of Portents

Weapon (mace), very rare (requires attunement by a cleric)

This stone mace has three faces, which can see into the past, present, and future. You gain a +1 bonus on attack and damage rolls with this magic weapon. On a hit, it deals an additional 1d8 psychic damage and the creature struck must succeed on a DC 16 Intelligence saving throw. If it fails, you gain advantage on Wisdom (Insight) checks against that creature and you also gain one extra reaction that you can use only against that creature. You must use this bonus reaction within 1 minute or it is lost. You cannot gain an additional bonus reaction against that creature until you complete a short rest. If you strike a different creature and it fails its saving throw before you have used this bonus reaction, you can switch your bonus reaction to the new target.

In addition to its use in combat, the mace of portents contains three charges. You can expend 1 charge to cast augury, 2 charges to cast clairvoyance, or 3 charges to cast legend lore. The mace regains 1d3 charges each day at dawn.