Circle of the Pure Moon

You are able to transform into dinosaurs. It's pretty much circle of moon but better. Why? Because the circle of moon sucks at later lvls 

Keen smell

You have advantage on tracking beasts smells

You get advantage on nature, survival, perception, to see or track a beast with their scent

Combat Wild Shape

When you choose this circle at 2nd level, you gain the ability to use Wild Shape on your turn as a bonus action, rather than as an action.

Additionally, while you are transformed by Wild Shape, you can use a bonus action to expend one spell slot to regain 1d8 hit points per level of the spell slot expended.

Finally, you can add add your wisdom modifier to the AC of your creature you transform into.

At lvl 14 this d8 upgrades to a d12 per spell lvl

Circle Forms

The rites of your circle grant you the ability to transform into more dangerous animal forms. Starting at 2nd level, you can use your Wild Shape to transform into a beast with a challenge rating as high as 1 (you ignore the Max. CR column of the Beast Shapes table, but must abide by the other limitations there).

Starting at 6th level, you can transform into a beast with a challenge rating as high as your druid level divided by 3, rounded down. Because my DM said it's to broken to change it 

Staring at 14th level u can transform into beasts of cr 8 but you must expend 3 uses of wild shape

Primal Strike

Starting at 6th level, your attacks in beast form count as magical for the purpose of overcoming resistance and immunity to nonmagical attacks and damage. Add 2 damage die to your wild shape attacks

Circle Forms

The rites of your circle grant you the ability to transform into more dangerous animal forms. Starting at 6th level, you can transform into a beast with a challenge rating as high as your druid level divided by 3, rounded down.

Elemental Wild Strikes

You can expend spell slot once per turn to do a elemental smite. 1d4 per level spell expending.

This works in a wild shape and as well as attacks.

King of beasts

When you reach 14th level, creatures of the natural world sense your connection to nature and become hesitant to attack you. When a beast or humanoid creature attacks you, that creature must make a Wisdom saving throw against your druid spell save DC. On a failed save, the creature must choose a different target, or the attack automatically misses. On a successful save, the creature is immune to this effect for 24 hours.

Circle of form max

At 14th lvl u can transform into a cr 8 beast with the wild shape restrictions

This beast has to obied by the wild shape rules.