How Do i Do This

I wanna know how do i put a sword on a model like a imported sword on a peasant for example plzzz tell me how

2 ways of doing this. First is with an ability and the second is with triggers.

To use an ability, modify Slow Aura (Tornado) to affect None targets. Change the target art of the ability to the custom model you want to use. Set attachment points to the appropriate values (in this case, "weapon" or "hand,right"). Finally, add this modified ability to any unit you want to have that custom model.

To do this with triggers, use the followign action.

Special Effect- Create special effect with <path> on <unit>

Change the <path> to the path of the imported file, change the unit to the chosen unit.

also if the sword model doesnt have a death animation you can always use sphere as a base abbility too and do what Th15 told you