Greater Mark of Detection

Greater Mark of Detection
Feat
Prerequisite: Level 4

You gain the following benefits.
Improved Intuition.
When you use the Deductive Intuition benefit of your Mark of Detection feat, you can roll 1d6 instead of 1d4.
Shared Detection.
When you use the Magical Detection benefit of your Mark of Detection feat to cast See Invisibility without a spell slot, you can choose one creature you can see within 30 feet of yourself. That creature also gains the benefits of the spell for its duration.

Source: Eberron: Forge of the Artificer (EFA), page 43