Is this very rare or legendary? Can't decide

Orb of Hymns

Wondrous Item, Very Rare (Requires Attunement by a Spellcaster)

A smoky crystal sphere the size of an apple, with threads of golden light snaking within. When used, it resonates with a distant, ethereal choir. Sages claim these orbs were forged by a draconic celestial entity, as a means to speak with its champions. You can use this orb as a spellcasting focus, and it serves as material component for the Scrying spell.

Empowered Summoned Dragon. When you use the spell Summon Dragon using the orb as your spellcasting focus, it doesn’t require Concentration and lasts for an additional hour.

Spells. The orb has 5 charges and regains 1d4 + 1 expended charges daily at dawn. You can cast the spells on the following table from it. You use the same spellcasting ability you use for your spells and still need to provide material components that are consumed. The table indicates how many charges you must expend to cast the spell and you can upcast a spell by spending 1 additional charge per slot level.