After spending the casting time tracing magical pathways within a precious gemstone, you touch a Huge or smaller beast or plant. The target must have either no Intelligence score or an Intelligence of 3 or less. The target gains an Intelligence of 10. The target also gains the ability to speak one language you know. If the target is a plant, it gains the ability to move its limbs, roots, vines, creepers, and so forth, and it gains senses similar to a human's. Your GM chooses statistics appropriate for the awakened plant, such as the statistics for the awakened shrub or the awakened tree.
The awakened beast or plant is charmed by you for 30 days or until you or your companions do anything harmful to it. When the charmed condition ends, the awakened creature chooses whether to remain friendly to you, based on how you treated it while it was charmed.
* - (an agate worth at least 1,000 gp, which the spell consumes)
Our DM accidently gave us a magic item that does this at will... My Druid is very happy
Since this is basically permanent, I'd like to imagine that there are occasional wild animals that had this cast on them and now just go around like any other animal but can talk. They now have to deal with likely being the only sapient version of their species. Imagine being the only human who can speak, and every other human has the brain of a squirrel. That could go a lot of different ways.
Yeah it's a spell called "Lobotomy"
Wizards can use wish to awaken an animal in one action. Take that as you will
Couldn't this technically be used on dead things so long as they are plants or beasts? Dead things don't have intelligence scores afaik, and the spell doesn't specifically state the target needs to be alive (Still very new to dnd mechanics, so I don't know if there's other stuff that would mean that wouldn't work, but rules as written it looks like it could based on what I know so far)