How to get Ancient leaves? it's in lush cave, dripstone cave and plains cave
how to build portal? you must do it like nether portal but replace obsidian with Ancient leavesa and use special igniter!
how to get new armor? you must find new ore Ancient dust ore and make a armor from that
new mob? it's in caves and it's very strong
new crossbow? YES you can easy make it but arrows for it are very expenisve
new liquid? yes you can find it in new dimension
and mystery potion you must find it same as new sword (you can craft sword in next uptade)
The Legendary Ancient Plains Team
