You summon oozes that appear in unoccupied spaces that you can see within range.  You summon oozes with a total challenge rating of 2.  Oozes with a challenge ration of 0 count as 1/16.  You tell the DM what combination of challenge rating you want, and he or she decides what oozes of that challenge rating combination you summon. 

An ooze summoned by this spell disappears when it drops to 0 hit points or when the spell ends.

The summoned creatures are friendly to you and your companions. Roll initiative for the summoned creatures as a group, which has its own turns. They obey any verbal commands that you issue to them (no action required by you). If you don't issue any commands to them, they defend themselves from hostile creatures, but otherwise take no actions.

The DM has the creatures' statistics.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the total challenge rating of oozes you can summon increases by 1 for each slot level above 4th. 

Sample Oozes