This staff can be wielded as a magic quarterstaff that grants a +2 bonus to attack and damage rolls made with it. While you hold it, you gain a +2 bonus to spell attack rolls. This staff, no matter what material it is made of, is considered wood for the purposes of the shillelagh cantrip. Additionally, if you cast the druidcraft cantrip you may cast it again as a free action once per turn. While attuned to the staff you gain the ability to speak with plants. 

The staff has 50 charges for the following properties. It regains 4d6 + 2 expended charges daily at dawn. If you expend the last charge, roll a d20. On a 20, the staff regains 1d12 + 1 charges.

Spell Absorption. While holding the staff, you have advantage on saving throws against spells. In addition, you can use your reaction when another creature casts a spell that targets only you. If you do, the staff absorbs the magic of the spell, canceling its effect and gaining a number of charges equal to the absorbed spell's level. However, if doing so brings the staff's total number of charges above 50, the staff explodes as if you activated its ever-growing strike (see below).

Spells. While holding the staff, you can use an action to expend some of its charges to cast one of the following spells from it, using your spell save DC and spellcasting ability: sunbeam (7 charges), wall of thorns (7th-level version, 7 charges), barkskin (2 charges),  conjure animals (7th-level version, 7 charges), awaken (5 charges), commune with nature (5 charges), transport via plants (7 charges), dream (7 charges), tree stride (5 charges), locate animals or plants (2 charges), or plant growth (4 charges).

You can also use an action to cast one of the following spells from the staff without using any charges: entangle, create or destroy water, animal friendship, beast bond, detect poison and disease, or faerie fire.