2024 rules reference for Giant Insect.
Use the spell slot's level for the spell's level in the stat block. Large Beast, Unaligned AC 11 + the spell's level HP 30 + 10 for each spell level above 4 Speed 40 ft., Climb 40 ft., Fly 40 ft. (Wasp only) MOD SAVE MOD SAVE MOD SAVE Str 17 +3 +3 dex 13 +1 +1 con 15 +2 +2 int 4 -3 -3 WiS 14 +2 +2 chA 3 -4 -4 Senses Darkvision 60 ft.; Passive Perception 12 Languages Understands the languages you know CR None (XP 0; PB equals your Proficiency Bonus) Traits Spider Climb. The insect can climb difficult surfaces, including along ceilings, without needing to make an ability check. Actions Multiattack. The insect makes a number of attacks equal to half this spell's level (round down). Poison Jab. Melee Attack Roll: Bonus equals your spell attack modifier, reach 10 ft. Hit: 1d6 + 3 plus the spell's level Piercing damage plus 1d4 Poison damage. Web Bolt (Spider Only). Ranged Attack Roll: Bonus equals your spell attack modifier, range 60 ft. Hit: 1d10 + 3 plus the spell's level Bludgeoning damage, and the target's Speed is reduced to 0 until the start of the insect's next turn. Bonus Actions Venomous Spew (Centipede Only). Constitution Saving Throw: Your spell save DC, one creature the insect can see within 10 feet. Failure: The target has the Poisoned condition until the start of the insect's next turn.