[SUGGESTION] Crystal check in offhand

[fxbt-zzz]

Issue:

• What is the feature you would like added? Check if the crystal can kill you, if it does then put a totem in the offhand.

Context:

• Why would this feature be useful? Have you tried any existing alternatives? Would prevent totem fails. I've seen this on Wurst+3.

Environment:

• What other clients do you run, PC setup, relevant servers?

Config:

• Attach any relevant parts of your config here.