Tigris

Drei is one of the 12 Dark Warlords.

In Fire Emblem: Seisen no Keifu, little is said about the Dark Warlords, but they are all fought in the Final Chapter near Barhara and eventually defeated, including Drei.

In Fire Emblem: Thracia 776, Drei is fought in the Final Chapter. The character that becomes Drei is Dagda if Dagda is either dead or not recruited.

Seisen no Keifu
Axe Users in this game fail sadly due to the massive weight of axes and the fact their weight directly decreases axe user's attack speed by the weight of the axe, and the same can be said for Drei. Kill him off with Lakche or Skasaher since both use swords and swords beats axes, and their Awareness skill nullifies Drei's Wrath skill, or just kill him at a range.

Base Stats
|Warrior |30 |80 |24/13 |N/A |18 |25 |4 |23 |16 |6 |Axe, Bow


 * Items: Silver Axe
 * Skills: Pursuit, Wrath
 * Leadership Stars: 0
 * Gold: 3000
 * Holy Blood: None
 * Axe Mastery Rank: A
 * Bow Mastery Rank: B

Thracia 776
Drei is one of the weakest of the six Dark Warlords in the Final Chapter. He has no skills, and his attack speed of 12 due to his heavy Master Axe means that he is easy to double attack. Just realise that the Master Axe has a 1~2 range, and Drei will go down easy.

Base Stats
|Warrior |20 |46 |17/4 |18 |14 |11 |5 |13 |4 |10 |Axe, Bow


 * Items: Master Axe
 * Skills: None
 * Leadership Stars: 0
 * Movement Stars: 4
 * Pursuit Critical Coefficient: 4
 * Axe Mastery Rank: A
 * Bow Mastery Rank: A