Bring nineteen rexes and one Yutyrannus to encourage the rexes

I used 5 level 30-40 megatheriums and a high level yuty and they cleaned up easy. Just make sure you have the megatheriums set to aggressive and be riding the yuty and doing the courage roar

Don't bring flying pets to the battle because I did and luckly my shot gun had lots of ammo so I managed to kill the gamma brood mother

It does not let flying pets in the arena .

On valguero you might find one in the spider ravine in the redwoods. It despawned after a while but I think it was only there to boost spider spawn rates or something

Use mutated megatherium

bring to many rexes or spinos pls like

All you really need is about 4-5 rexes level 400,a high level uty and maybe a daedon. For alpha double this

I had 18 megatheriums and a yuty with a daedon just make sure you have enough hp and attack damage on all of them.

I beat him with otters where is my metal

Use megatherium the giant sloth they have a rage mode against bugs so they kill the spider mother easily

I did the gamma with 3 rexes that each had 10k health and did about 10k damage one of the rexes lost a quarter of its health and the other two had almost full health and it was easy. I say this because everyone is saying get loads of megatheriums but you just need good rexes. Hope this helps.

19 Therizinosaur's and 1 high lvl yuty should do the trick

Bring as many megatheriums as possible but also bring one yutiranus to buff them ide recommend lvl 300 and up for good measure.

Bring big chungus sloths. It’s very easy with them

You actually don't need any rexes in this boss fight. for the gamma I think about 10 high level megatheriums a yutyrannus and a daedon will work. For higer difficulties just get more megas and maybe a bother daedon. Before entering, set the daedon(s) and the yuty to ingnore group whistles, then make tame ordering groups with like 3 to 5 megas each. When you enter the boss fight set the daedon passice healing on (make sure it has a lot of food on it and upgrade food because healing uses its food) and tell the megas to attack. They will all get stuck behind each other so only 4 or so will be dealing damage. Then choose a tame ordering group and make them move to the side of the broodmother,then make them attack. They will start attacking from the side and won't get stuck up front.Keep doing that until your megas surround the boss. The tame you will want to mount is the yutyrannus and then spam the crouch button for the courage buff. Remember minions will ignore its fear debuff. Good luck

U can use procoptodon to jump on the mushrooms on the island brood arena where it can't get u and u will be safe while the dinos u bring kill it on the ground. Also use comp bow as it does massive damage to it

Use 1 yut,4 daeodons,and 15 megatheriums.

So contrary to popular belief you do not need to have a bunch of mutated megatheriums in order to beat this thing, I made this mistake and wasted my time mutating forever and got op megatheriums which demolished the alpha easily via a single whistle. All you really need is a pair of some decent megatheriums that can breed and breed a bunch and probably imprint them but honestly you might not even need to, its an easy boss for sure.

Ah, the Broodmother. Commonly mistaken for a jellyfish.

On valgureo it spawns naturally.