The Summoning Ooze is an extraordinary creature formed from a failed summoning ritual. It appears as a translucent blob, roughly 4 feet across, with glowing arcane symbols floating within its protoplasm. These symbols pulse and swirl together, forming a summoning circle whenever the ooze uses its ability to summon monsters. Standing 6 feet in diameter and weighing 300 pounds, the Summoning Ooze has remarkable intelligence for an ooze and uses its summoned minions to defend itself. It secretes acid through its membrane, dealing additional damage with its attacks. The ooze can also split into smaller oozes as it grows, creating a versatile and dangerous opponent​