Excavate Ancient fossiled trunks to get Amber, and extract the Dna of these long forgotten giant Arthropods that will help you explore dangerous terrains.

First you have to find Fossillized trunks with Amber, the Amber must drop Suspicious Amber.

Then in a DNA Extractor you can Sintetize an Egg

After that, place it and wait for it to Hatch. Then Feed the babies till they grow (baby megarachne eats Raw Meats and the rest Eats Fruits and Sweets)

those same foods will bed need to feed them on adult age, cause they wont let you ride them if hungry