Thaumic Additions

Thaumic Additions is a small addon to Thaumcraft 4 which is still in developement but already has some nice features.

It adds new endgame metal - Adaminite Ingot and the armor and sword which can be crafted from this metal. This armor is extremely durable and provides excellent protection. It also gives huge Vis discount to the wearer. The sword deals massive damage: 28 damage when unenchanted and even more with additional upgrades. It has an Aura attack feature which attacks all mobs in an area around the player, dealing togglable damage (5, 15 or 30).
Adaminite Ingot can also be used to craft the most powerful wand in Thaumcraft 4 and all its addons - it is able to hold up to 2000 Vis of each type. And the staff can hold even more - 4500 Vis.
Adaminite Ingot can be used to craft wand caps - Charged Adaminite Cap gives 50% Vis discount and with additional items the resulting cost of Vis can be lower than 20% of the original values.
Wand Focus: Projectile is a highly customisable wand foci which can either create a huge explosion, spread Flux or collect ot, can also buff the mobs with Regeneration or debuff them with Taint Poison, creating tainted variants from these mobs when they die.
Darkness Generator can produce Void Seed from Seeds and requires no fuel or other tyoes of energy to run.
Monolith - a big naturally generating structure with several loot chests and rare blocks.

This mod also has tonns of currently unimplemented blocks and items which will become very useful and powerful when they will be completed.