How to have macro stop when you use a mod key

Just wondering how to make it so when you use a mod key it halts everything else and forces it to use skill you have assigned on mod. Have boomy macro im using and when i use mod key sometimes it doesnt trigger for alittle bit

[nomod] on every spell except the modifier spells

1 Like

can you show me an example

/cast [nomod] Spell u want to activate without mod
/cast [mod:shift] Spell u want to activate with mod