Complex sentence: Area of effect is not just limited to simulate the effect of explosions though, for example a powerful healing spell can affect anyone within a certain range of the caster (often only of they are a member of the casters party).
Split into simpler sentences: Area of effect is not just limited to simulate the effect of explosions though. For example, a powerful healing spell can affect anyone within a certain range of the caster (often only if they are a member of the caster's party).