Undead Fortitude. If damage reduces the arcaneexposed to 0 Hit Points, it makes a Constitution saving throw (DC 4 plus the damage taken) unless the damage is Radiant or from a Critical Hit. On a successful save, the zombie drops to 1 Hit Point instead.
Sence for Arcane. If you successfully land a hit by any spell on this creature, it makes saving throw (half of attack roll - it's spellcasting modifire) acording to you spellcasting ability (CHA, WIS, INT). If it succeedes it can use it's reaction for dealing half damage of the spell to you and it doesn't take any damage.
Spellcasting. It can cast one spell of any spell table (3 spellslots).
Slam. Melee Attack Roll: +3, reach 5 ft. Hit: 5 (1d8 + 1) Bludgeoning damage.
Comments