A list of homebrew spells that lack a proper 5e equivalent. If I'm missing some important, iconic spell please tell me.

Eye of Kilrogg: Is a variant of Clairvoyance. Only sight, has a fly speed of 30ft, can be attacked (AC 13, destroyed if it takes any damage), cannot pass through solid objects or spaces smaller than 1 inch. No focus, instead an eye as a material component (fresh or preserved, is consumed on use).

Portal Spells: Portals to a specific place are a variant casting of Arcane Gate. Locations can be learned (by being taught or from some written sources) without expending spells known or taking feats; travelling to another plane requires a spell slot one level higher (normally 7th level).

Lesser Polymorph: Level 2, as Polymorph, lasts for duration or until target takes any damage, only medium or smaller beasts of CR 1/4 or less