Sources
CR
Type
Size
Alignment
Movement

Phaia

Medium Humanoid (human), Any alignment

Armor Class 12, 15 with mage armor
Hit Points 66 (12d8 + 12)
Speed 30 ft.
STR
9
-1
DEX
14
+2
CON
12
+1
INT
17
+3
WIS
12
+1
CHA
11
+0
Saving Throws INT +7, WIS +5
Skills Arcana +7, History +7
Damage Resistances necrotic
Senses passive Perception 11
Languages any four languages
Challenge 9 (5,000 XP)

Traits

Grim Harvest (1/Turn). When necromancer kills a creature that is neither a construct nor undead with a spell of 1st level or higher, Phaia regains hit points equal to twice the spell's level, or three times if it is a necromancy spell.

Spellcasting

Spellcasting. Phaia is a 12th-level spellcaster. Its spellcasting ability is Intelligence (spell save DC 15, +7 to hit with spell attacks). The necromancer has the following wizard spells prepared:

Cantrips (at will): chill touch, dancing lights, mage hand, mending

1st level (4 slots): false life*, mage armor, ray of sickness*

2nd level (3 slots): blindness/deafness*, ray of enfeeblement*, web

3rd level (3 slots): animate dead*, bestow curse*, vampiric touch*

4th level (3 slots): blight*, dimension door, stoneskin

5th level (2 slots): Bigby's hand, cloudkill

6th level (1 slot): circle of death*

*Necromancy spell of 1st level or higher

Actions

Withering Touch. Melee Spell Attack: +7 to hit, reach 5 ft., one creature. Hit:5 (2d4) necrotic damage.