In D&D 5e, the Awaken spell allows a gain of intelligence and ability:
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.
How does one get this Awaken spell to work on plants or animals with an Intelligence score higher than 3?
The baboon and some giant creatures have an Intelligence of 4 (or greater). Even the Shambling Mound would be an amazing pet (for a month), were it not so deeply clever. Yet, if high school taught us anything, baseline and expected intelligence is not guaranteed. Perhaps there is a work-around?
-
Give the target a Feeblemind spell first.
-
Enroll them in high-contact American sports.
-
Polymorph them into a more-stupid beast, then they change back smarter! Though StackExchange gave this one a complicated answer.
-
Admit that the author is probably making a bigger deal out of this than necessary and just House Rule the damn thing.
How can one imbue bonus Intelligence (and myriad abilities) to plants and/or beasts with a wee bit too much Intelligence?
Best Answer
You have to reduce their Intelligence below the threshold
You will need to reduce their Intelligence in order for this to work.
Wishcould potentially be used to do this, but may come with its own consequences for a request like that.
Here are a few more options.
Both of the options below require giving an NPC an immensely powerful item or arranging for a very strong relationship between the NPC and a demon lord.
Giving an artifact with major detrimental properties to the creature
The DMG has an option for DMs to give artifacts (and other magical items) beneficial and detrimental properties:
If you were to gain access to an artifact, and have it exhibit the following major detrimental property, then it could work:
However, you would need get an artifact and have the creature attune to it. And have either the DM provide this property or have it randomized.
Giving a deck of many things to a creature and hoping they pull the right card
Thomas Markov's answer suggests this as another possibility. The Idiot card in the deck of many things says:
Demonic Boon
Mordenkainen's Tome of Foes relates that NPCs/Monsters may given a boon by the DM in relation to a Demon lord. The Jubilex is able to offer: