Lifesteal items allow you to heal yourself by attacking another player. However, I am finding items are either physical lifesteal or magical lifesteal.
I know gods are classed as either physical or magical, but not sure how this applies to these two types of lifesteal. Maybe there is no connection.
It looks like physical lifesteal applies to auto attacks only, and magical applies to abilities. However, this is only from my observations. I cannot say for certain.
Best Answer
Physical lifesteal applies only to physical basic attacks and abilities, which specifically say, they apply on-hit effects; magical to magical basic attacks and abilities. A physical god deals physical damage on basics, a magical god magical. This is so, because physcial basics are more powerful than magical, i.e. they scale better with physical power.
You can buy magical lifesteal on a physical god and vice versa, but it will not have any effect.
From the Smite Wiki
other sources: Reddit Reddit