Everyone is saying that destiny bond will only take out the attacker if the user uses the move first, and the effect will only last for that turn.
My Mamoswine used icicle crash on the foes Trevenant but doesn't quite take it out, Trevenant then uses destiny bond AFTER me. The following turn I use ice shard to finish him off, but the destiny bond took me out as well. Wait, what? WHAT? WHAT!?
Someone explain. Please. I'm confused.