Conjure Planar Beast

You call forth a beast to aid you, bringing it through one of the elemental planes before it reaches you, imbuing it with elemental magic. It manifests in an unoccupied space that you can see within range. The beast has a CR less than or equal to the spell level. When you cast this spell, select an elemental plane that the beast has been infused with. It gains the benefits of whatever plane it went through, often accompanied with physical changes.

Elemental Plane of Fire: The beast gains resistance to Fire damage, and deals an additional 1d6 fire damage whenever it hits with an attack

Elemental Plane of Water: The beast gains resistance to Cold Damage, can breath Air and Water, and gains a Swim speed of 30 ft.

Elemental Plane of Earth: The beast gains a Burrowing speed of 20 ft, and Tremorsense to a range of 15 ft

Elemental Plane of Air: The beast gains a flying speed of 30 ft

At higher levels: When you cast this spell at higher levels, the maximum CR of the summonable beast is equal to the level of the spell slot used.