Fey Ancestry. Kasimir has advantage on saving throws against being charmed, and magic can't put him to sleep.

Special Equipment. Kasimir wears a ring of warmth and carries a spellbook containing all the spells he has prepared plus the following spells: arcane lock, comprehend languages, hold person, identify, locate object, nondetection, polymorph, protection from evil and good, and wall of stone.

Spellcasting. Kasimir is a 9th-level spellcaster. His spellcasting ability is Intelligence (spell save DC 14, +6 to hit with spell attacks). Kasimir has the following wizard spells prepared:

Cantrips (at will): fire bolt, light, mage hand, prestidigitation

1st level (4 slots): detect magic, mage armor, magic missile, shield

2nd level (3 slots): misty step, suggestion

3rd level (3 slots): counterspell, fireball, fly

4th level (3 slots): greater invisibility, ice storm

5th level (1 slot): cone of cold

Dagger. Melee or Ranged Weapon Attack: +5 to hit, reach 5 ft. or range 20/60 ft., one target. Hit:4 (1d4 + 2) piercing damage.