Greater Mark of Sentinel

Greater Mark of Sentinel
Feat
Prerequisite: Level 4

You gain the following benefits.
Improved Intuition.
When you use the Sentinel's Intuition benefit of your Mark of Sentinel feat, you can roll 1d6 instead of 1d4.
Improved Sentinel.
When you use the Vigilant Guardian benefit of your Mark of Sentinel feat, you can also make one attack with a weapon or an Unarmed Strike as part of that same Reaction.

Source: Eberron: Forge of the Artificer (EFA), page 44