[RPG] What are the advantages of taking “Sculptor of Flesh” eldritch invocation over taking Polymorph as a spell


I think I misunderstand how the eldritch invocations that grant spells "using a warlock spell slot".

Sculptor of Flesh Prerequisite: 7th level

You can cast Polymorph once using a Warlock spell slot. You can’t do
so again until you finish a Long Rest.

Looking at the Warlock spell list, you are also able to take Polymorph as a spell at 7th level. If I took Polymorph as a spell, couldn't I cast it using pact slots every short rest? What is the point of using this as one of my eldritch invocations?

Best Answer

Polymorph is not, in fact, on the warlock spell list. The only way a single-class warlock can get access to polymorph by themselves is through the invocation.