Staff of the Dark Phoenix

After reaching zero hit points, the Staff of the Fallen Cardinal explodes in a fireball hundreds of feet wide. The staff, stuck in the ground, crumbles away, revealing dark, almost black textured metal. Upon further inspection, the texture appears to be millions of tiny runes engraved along every inch of it's surface. The base transforms from the familiar tree roots into a single sharp point. The ring at the top crumbles into a large open semi-circle. Perched atop is a large Phoenix that takes the place of the Cardinal.
While attuned, this staff may be used as an arcane focus, granting a +4 on attack and damage rolls.
The Fallen Cardinal: This is a sentient staff controlled by the DM, with 1000 HP. The staff takes all damage the user does while equipped. The staff naturally heals 1d6/round which it shares with the user. While attuned, both the staff and the wielder are immune to fire damage as well as resistant to radiant damage. Once The Phoenix drops to zero hit points, the staff explodes in a large fireball that deals 20d20 damage in a 300ft radius, spell sculpted to protect the user an up to 10 allies of The Phoenix's choice. Current HP: 1000.
""Emotionally Volatile:"" When the user is affected by fire or radiant damage, or if the user takes more than 50 damage in a single hit, the Staff surges in retaliation. Roll a d10 on the Fuck You Table as the listed effect takes hold. When the user or the staff are affected by strong emotions, such as during combat (or at player/DM discretion), the Staff will surge with magical energy. Roll a d20 on the Emotional Surge Table as the listed effect takes hold.
Blessing of the Phoenix: While attuned, this Staff permanently grants you the effects of the spells Speak with Animals/Plants, Water Walk, Tree Stride, and Control Flame. While attuned, you may cast the either the spell Investiture of Flame or Fly without using a spell slot once per short rest each.
Through Thick and Thin: As a bonus action, shout a command to the staff as The Phoenix flies out to do your bidding. May be subject to Emotional Surge depending on the action and the mood of the staff. Additionally, the staff may act randomly of it's own accord. Nobody tells Gil what to do.
Everything But The Kitchen Sink: This staff has 25 charges. As an action, you may expend charges to cast the following spells. You may upcast spells cast with the staff by expending additional charges, one per level. Regain all expended charges after a long rest. When expending a charge, Roll a d20. On a 1-5, roll a d100 on the Wild Magic Surge table.

• Dragon's Breath (fire) - 1 charge

• Daylight - 1 charge

• Dispel Magic - 2 charges

• Control Water - 2 charges

• Fireball - 2 charges

• Conjure Animals - 2 charges

• Wall of FIre - 3 charges

• Immolation - 3 charges

• Polymorph - 3 charges

• Commune with Nature - 3 charges

• Control Wind - 3 charges

• Widogast's Web of Fire - 3 charges

• Mass Cure Wounds - 4 charges

• Greater Restoration - 5 charges

• Heal - 5 charges

• Transport via Plants - 6 charges

• Fire Storm - 6 charges

• Sunburst - 7 charges