Innate Spellcasting. The Argos can cast the following spells without any material components. It can cast ten spells per round, but may not perform any actions while doing so:

• 10/Day: Blindness/Deafness, Burning Hands, Charm Monster, Chill Metal, Clairaudience/Clairvoyance, Confusion, Darkness, Detect Thought, Dispel Magic, Emotion, Fear, Flesh to Stone, Fumble, Heat Metal, Hold Monster, Light, Minor Image, Shield, Slow, Suggestion, and Tongues.
• At Will (one per round): Alter Self, Color Spray, and Ray of Enfeeblement.

Amorphous. An Argos can move through a space as narrow as 1 inch wide without squeezing.

Create Air. An argos naturally produces breathable air as part of its metabolic processes. As such, it cannot be drowned or asphyxiated, and it gains a +4 to save against gas borne attacks.

Multiattack. The Argos makes 18 bite attacks per turn. Optionally, it can substitute some of these bites for weapon attacks with up to 18 medium or smaller weapons, if it possesses any.

Bite. Melee Weapon Attack: +3 to hit, range 5 ft., one target. Hit: (1d4) piercing damage, and the Argos can make a grappling check with its pseudopod. On a success, the target is grappled.

Swallow Whole. The Argos may attempt to swallow whole any medium-sized or smaller target that has been successfully grappled. On a successful grapple check, the grappled creature is swallowed, and takes 8 points of acid damage for every round that it is inside of the Argos. A swallowed creature can cut its way out of a stomach pouch by using Small or Tiny slashing weapons to deal 8 points of damage to the stomach lining (AC 20). An Argos is immune to its own acid and the stomach lining immediately seals up afterwards. An Argos can hold one Medium sized, two Small, four Tiny, eight Diminutive, or 16 Fine or smaller creatures, each in its own separate stomach pouch.