Ander's Easy Doppelganger

You throw the statuette described in the spell's material components into an unoccupied space beside you, transforming it into an identical living replica of yourself.  The spell also replicates your nonmagical weapons and equipment.  The doppelganger's game statistics, abilities and actions are identical to yours, except that its hit points are equal to 5 times your spellcasting ability modifier, and it cannot have spell slots above 3rd-level.  It is also incapable of concentrating on spells, and cannot attune to magical items.

Your doppelganger takes its turn immediately after yours in the initiative order.  When you first create your doppelganger and again on subsequent turns, you may use a bonus action to mentally command the copy to move and perform one of its actions, as long as you and your doppelganger are within 120 feet of each other and on the same plane of existence.  If you give it no command, the doppelganger will move away from danger and take the Dodge action on its own.

Alternatively, you may verbally describe a more detailed task which you would like your doppelganger to complete on its own.  The doppelganger will perform this task to the best of its abilities, based on your instructions.  If the doppelganger completes its assigned task or determines that the task is impossible to perform within the duration of the spell, it will instead attempt to return to you for further instructions.

The doppelganger remains for the spell's duration, until it is reduced to 0 hit points, or until you choose to dismiss it as an action.  If you dismiss the spell, the doppelganger returns to its former shape as a statuette and you may reclaim it.  If the spell runs its full duration, you lose concentration, or the doppelganger is reduced to 0 hit points, it instead shatters into shards of ivory and you must craft a new ivory effigy before casting the spell again.