|It increases the power of its wearer's magical spells.|
This ego is ideal for early- to mid-game spellcasters to help maximize spellpower, although it becomes less useful during the late game once you have already reached your spellpower cap.
The spell enhancing effects of Archmagi are particularly useful for binary schools of magic, such as Hexes. Conjurers and other direct damage dealers might simply deal a little more damage per hit, but for Enchanters, this ego can make the difference between the spell succeeding or failing entirely.
The archmagi ego can be found on:
In ancient versions of Crawl, before 0.8, this ego reduced spell failure rates in addition to increasing spell power, but it also reduced XP gain to 1/4 of normal, providing a serious threat of undertraining to most characters.