The masks float downstream toward the Mirrorlake, where faces arise to wear them.

Reflections of Littjara

As this enchantment enters, choose a creature type.
Whenever you cast a spell of the chosen type, copy that spell. (A copy of a permanent spell becomes a token.)

The Lost Caverns of Ixalan Commander

As Reflections of Littjara enters the battlefield, choose a creature type.
Whenever you cast a spell of the chosen type, copy that spell. (A copy of a permanent spell becomes a token.)

Wilds of Eldraine Commander

Commander Legends: Battle for Baldur's Gate

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You must choose an existing creature type, such as Zombie or Angel. You can't choose card types (e.g., artifact) or supertypes (e.g., snow).

As a copy of a permanent spell resolves, it's put onto the battlefield as a token rather than putting a copy of the spell onto the battlefield. The rules that apply to a permanent spell becoming a permanent apply to a copy of a spell becoming a token.

If a spell has the kindred card type and the chosen creature type, Reflections of Littjara will copy it.

The token that a resolving copy of a permanent spell becomes isn't "created." Abilities that refer to a copy being created won't interact with the copy resolving.

The triggered ability and the copy it creates will resolve before the spell that caused the ability to trigger.