Wondrous Item, rare (requires attunement by a By a creature with multiple attacks per turn)
After attuning to this item you may trade your offensive power for the ability to react to anything around you.
As a bonus action; you may elect to trade a single attack from your next attack action for an extra reaction on this turn. This extra reaction must be used to make an opportunity attack against a creature who moves into a space that threatens an allied creature.
You may use this a number of times per day equal to your proficiency modifier.
Notes: By a creature with multiple attacks per turn
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