Is the LEGO Phoenix Temple Accessory Pack (5002134-1) still collectible?

Yes, as a piece from the 2014 Legends of Chima theme, it holds value for dedicated Chima collectors.

Does this accessory pack come with any actual LEGO pieces?

According to the set information, this accessory pack (5002134-1) lists 0 pieces.

The LEGO Phoenix Temple Accessory Pack (5002134-1) is part of the Legends of Chima theme.

Name: LEGO Phoenix Temple Accessory Pack (5002134-1)
Brand: LEGO

Legends of Chima

Legends of Chima · 2014

Theme · Legends of ChimaPieces · 0Set Number · 5002134-1Year · 2014

Used

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New / Sealed

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Is the LEGO Phoenix Temple Accessory Pack (5002134-1) still collectible?: Yes, as a piece from the 2014 Legends of Chima theme, it holds value for dedicated Chima collectors.
Does this accessory pack come with any actual LEGO pieces?: According to the set information, this accessory pack (5002134-1) lists 0 pieces.
What theme does the Phoenix Temple Accessory Pack belong to?: The LEGO Phoenix Temple Accessory Pack (5002134-1) is part of the Legends of Chima theme.