Aguilantis Flute

This flute of unknown origin appears to be a conduit to a patron. When the flute is blown, no noise can be heard from the flute. When attuned, the flute's ornate etching changes and reflects the patrons personality. 

Spellcasting Focus. You can use the flute as a spell casting focus.

The flute has properties associated with the combination of flute holes covered, known to the warlock as soon as attuned and is dependent on pact taken. It has one other properties as well, detailed below.

Pact of the Blade - Conjured pact weapon forms around the flute, with the flute becoming the hilt. In addition, the list of conjured pact weapons now extend to ranged and thrown weapons. If thrown, the weapon returns as part of a bonus action. You also learn the shield spell, and can cast the spell without expending a spell slot, a number of times equal to your proficiency bonus.

Pact of the Chain - You learn the the Find Steed spell and can cast it as as a Magic Action without expending a spell slot. The flute forms reins that connect to the steed.

Pact of the Tome - The tome utilises the flute as the spine of the book. Spells known extends to the level 1 Wizard spells. Spells that can be casted at a higher level, are cast at the spell slot available to the your current warlock level.

Fly, Greater Invisibility, Mass Suggestion, Mislead and Knock. Once the instrument has been used to cast a spell, it can’t be used to cast that spell again until the next dawn. The spells use your spellcasting ability and spell save DC.

Notes: warlock, Creation, Utility, Combat, Instrument, Sentient, evocation, transmutation, enchantment