This is the 26th encounter in my 4E conversion of The Sunless Citadel. I beefed up the goblins and added some twig blights in the study to make combat even worth it.
Encounter 26: Nature’s Lore
Encounter Level 3 (775 XP)
Overview
The PCs traverse the underpass and find themselves at the end of a long corridor facing two [...]

This is the 25th encounter in my 4E conversion of The Sunless Citadel. Now that I have access to more content through DDI, I’m making a greater effort to replace some of the spell scrolls included in the original treasure with official alchemical formulas or rituals that are either exact translations, or produce similar results.
Encounter [...]

This is the 24th encounter in my 4E conversion of The Sunless Citadel. I created the bugbear gardener, a 2nd level skirmisher for this encounter. The encounter is a +3 above the maximum level a PC should attain in this module, making it a hard encounter, technically speaking. However, I’ve staggered the enemies into [...]

This is the 23rd encounter in my 4E conversion of The Sunless Citadel, in which I take a stab at creating my first 4E disease.
Encounter 23: The Goblin Workshop
Encounter Level 1 (200 XP)
Overview
The PCs find themselves in an alchemical workshop where Belak the Outcast’s goblin lackeys work to perfect an elixir that will turn living [...]

This is the 22nd encounter in my 4E conversion of The Sunless Citadel. I combined areas 44, 45, and 46 of the original adventure for this encounter.
Encounter 22: Rift Node
Encounter Level 2 (625 XP)
Overview
Some past geological event rent this section of the citadel, exposing the nest of a thoqqua. The creature attacks any intruders into [...]

This is the 21st encounter of my 4E conversion of The Sunless Citadel. I’m now using the DDI Monster Builder to generate my stat cards, and you may notice that I’ve updated my 4E twig blight brute from the original posting. The minion and artillery versions are getting similar treatment in future encounters.
Encounter 21: Compost [...]