Please Note: This was done for 1.13. Although most of these seem to still be working, please take care. Maybe test first in a test world. I’ll create a 1.14.4 version soon.
Need Nether Stars for Beacons but killing the wither scares you? Use one of the tricks that work in 1.13 too! Very little damage taken and I do it without armour in the video.
NOTE: This is with Java version. I’ve been told the 3rd option doesn’t work with Bedrock. Also reports of Wither escaping.
Check out the Wither Trapping Video: https://youtu.be/Fa9v8Ztmw6s