You can make an Aura Land very briefly (it's about as stable as Moscovium).

Have the following cards on the battlefield:

• Mycosynth Lattice
• March of the Machines
• Ashaya, Soul of the Wild

Then cast any aura. It will be an Enchantment Artifact Creature Land - Aura. It will then be put in the graveyard the next time state-based actions are checked because creature's can't be attached to other objects and auras must be attached to some other object.

You can make an Aura Land very briefly (it's about as stable as Moscovium).

Have the following cards on the battlefield:

• Mycosynth Lattice
• March of the Machines
• Ashaya, Soul of the Wild

Then cast any aura. It will be an Enchantment Artifact Creature Land - Aura. It will then be put in the graveyard the next time state-based actions are checked because creature's can't be attached to other objects and auras must be attached to some other object (unless it's an aura you cast with "bestow", in which case it will stop being an aura).