Greater Mark of Making

Greater Mark of Making
Feat
Prerequisite: Level 4

You gain the following benefits.
Improved Intuition.
When you use the Artisan's Intuition benefit of your Mark of Making feat, you can roll 1d6 instead of 1d4.
Improved Making.
When you use the Spellsmith benefit of your Mark of Making feat to cast Magic Weapon without a spell slot, you cast the spell as its level 3 version.

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