Whilst they may not be able to fit through wood/stone dinosaur gateways, they can git through small tek dinosaur gateways.

They spawn in the volcano biome on genesis

Toss a lightpet on the ground, put a metal foundation over it , switch it to block.

Drop all eggs on foundation

Lure basilisk to it

Rock Drake eggs must be dropped from PLAYER'S inventory, not mounted Dino's. Otherwise, basilisk will not eat egg

They eat regular wyvern eggs too

What a pretty plant let’s touch I-

Basilisk: nom

When it is underground it does use stamina which means it can not be underground permanently, it is extremely fast when it is underground and untargetable, and when underground it will be blocked by structures such as, walls, foundations, rocks, etc.

A hazard helmet blocks its poison. It takes its durability down, though.

Seems like raising a rock drake 1st will help you tame these. 1st raise a drake. 2nd collect a bunch of rock drake eggs. 3rd find a basilisk and while riding the cloaked drake drop the eggs one by one and it will eat them.

Be careful riding this thing underground. You will have your oxygen drain and begin suffocating if you are under too long.

It says not violent taming. I'm just waiting for noob to go up to this thing. HAHAHAHA

Getting it to eat the egg is pretty easy, just throw an egg on the ground, then get close enough to it (maybe on a fast tame) for it to come out of the ground. Run away towards the egg with the basilisk following you, and then keep running until out of targeting range. Heading behind a giant rock or metal plate helps. Once the basilisk stops following you, it’s will head directly over to the egg and eat it! I got two basilisks this way today :D 🆙 if helpful :)

Me: Sees a cool V on the ground, explores

Basilisk: Hey did you come to feed me?

Fun Fact: Basilisks cant take torpor.

This guy takes a mass amount of fall damage, so be very careful when climbing.

The danger noodles of the ground,

They hiss a dangerous green gas,

Slightly like the poison wyvern,

But with a more lethal mass.

They slither under your feet,

And only show their resting trident tail,

Don't trust this sneaky way,

Of getting a delicious treat.

Newest patch confirms taming on genesis with Magmasaur eggs!

Actually the Basilisk only eats Rock Drake fertilized eggs. The wiki says that it should also eat other fertilized eggs, but currently it ignore them. Probably it's a bug, for now feed it Rock Drake eggs

I tamed it by using a bloodstalker, simply climbed a wall above it (where it couldn’t spit acid at me) and threw magma eggs down to it. Make sure the area is clear of anything it could Target

Ok, listen up they can spawn in the portal area. It killed me and friends about 10 minutes in the dlc. It just spawned in our faces.