Is there a simple way to identify the true Lunatic Cultist?

During a battle with the Lunatic Cultist, he will summon duplicates of himself and perform a ritual. Attacking the incorrect cultist causes a Phantasm Dragon to appear. Is there a fairly easy way to determine (short of just guessing) which of the cultists is the true one? I occasionally get the feeling that the shading on the real one is slightly different, but I haven't been able to tell for certain.
Best Answer
The real Cultist's eyes are shaped more like a "/" and the fake one's are more circular. Check the wiki for images:
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How do you know which Lunatic Cultist is the real one?
TipsIs the Lunatic Cultist easy?
If the Lunatic Devotees are killed and Cultist Archers are lured away and killed far away, the Lunatic Cultist will not spawn. The Cultists will not respawn, either. This can be fixed by reloading the world.The ABSOLUTE EASIEST Way to Beat The Lunatic Cultist in Terraria!
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Answer 2
Another very easy way to identify the true Lunatic Cultist is by using a Hunter Potion, which highlights enemies in red/orange. Only the true cultist will be highlighted by the potion.
Answer 3
Adding on to what Chippies said, having homing weapons (like the post golem possessed hatchet) can aid in finding the true cultist. This is because the homing weapon would ignore the cultist clones and only target the true one.
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