Circle Tattoo

The Circle Tattoo, is an optional skill in Infernium; it serves as the fourth out of six possible powers Marina can aquire and is also one of the powers that she activates with her left hand.

Location
The Circle Tattoo is found in the corridors just below Memorandum and rests in a small room blocked by a Light Barrier requiring two Harvesting Fingers in order to unlock. As Memorandum is one of the first places you will explore when starting an adventure, the Tattoo can be encountered very early!

Appearance
In a similar vein to The Triangle Tattoo, The Circle Tattoo appears as a glowing ring on the back of Marina's left hand once gained.

Acquisition
In order to obtain the Circle Tattoo, Marina will need approximately two Harvesting Fingers in order to remove the Light Barrier. This means that she will have to traverse both The Floating Castle, The Rain Bridge and complete the subsequent Ritual in the Green Hallways before she can obtain the Tattoo.

As stated above, the Circle Tattoo is an optional item and is not required to complete the adventure, however, it's abilities prove to be incredibly useful, and as such, seeking it out is always a good idea, especially for the unexperienced.

Effects
Once aquired, The Circle Tattoo will blink and emit a rhythmic pulsing noise akin to a heartbeat whenever enemies are nearby.

This makes traversing the rest of Infernium as well as new playthroughs far more easier and much less unnerving as now enemies are now no longer hidden and Marina can focus more on creating a strategy to deal with them rather than risk being attacked trying to discover their whereabouts.

Trivia

 * Upon aquiring The Circle Tattoo, you will be awarded the achievement/trophy, "The Alarm."
 * The name of said trophy is a nod to the tattoos' purpose in allowing Marina to detect enemies.