Void Spider

Pale, horse-sized arachnids that become ghostly and intangible.

AC 13, HP 23, ATK 2 bite +4 (1d8 + poison), MV near (climb), S 3, D 3, C 1, I -1, W 1, Ch -2, AL C, LV 5

Impervious. Immune to cold.

Phase. Once per round, become corporeal or incorporeal.

Poison. DC 12 CON or drop to 0 HP in 1d4 rounds.