Implosion kills allies
per the wiki
The caster creates a vortex of destruction that tears asunder all living things within its area of effect that are not allies, killing them instantly unless they make their saving throw. A maximum of 4 targets can be affected.[[Category:Evocation Spells|Implosion]]
Implosion kills party members when in combat. According to the wiki this is a bug.
Reported by Slow Feet