Two Faces of Evil is Chapter 18 of Fire Emblem: The Sacred Stones. This chapter is unique, as it features Gorgon Eggs, which cannot be found in any other chapter. There are many eggs in the area, along with a few Gorgons, Gargoyles, Mogalls and Baels. The eggs are quite weak; they have only 5 HP, but every time you get near them, on the Enemy's Phase, they increase by 5 HP. The eggs will take around three to five turns to hatch; once they do, Gorgons will spawn from them.
The red, cracked tiles will damage any unit that stands on it for 10 HP. These tiles can be used to perform the Enemy Control glitch, and can also be deactivated by a Thief, Rogue, or Assassin by ending their turn on one of them.
- Turn 6: 3 Baels near the two eggs east of the boss; 1 Gargoyle north-east of the boss; 2 Baels from the lower eastern edge of the map, in-between the two trapped areas
After completing, monsters will attack Nerelas Peak at times.
- Arch Mogall
As always, regardless of boss, there will always be Gorgon Eggs. Fog of War does not occur.
Subjective: The following part of this article is based upon the editor's personal experiences and opinions, and therefore may not be applicable for all readers.
As Gorgons have a dangerously high magic attack (Demon Surge can hit over 20+ damage on the correct unit), try to defeat as many as you can. The eggs are not strong, but some are usually out of reach. It's very difficult to stop all of the eggs from spawning, unless you're using a team mostly (or entirely) comprised of mounted units, but fortunately, the Gorgons will not move most of the hatched units. A Gorgon in the map uses Shadowshot, a deadly long-range attack similar to Bolting. If you let some of the eggs hatch, a few will also have Shadowshot. The boss is quite easy to defeat as it has 44 HP and no Shadowshot; just Demon Surge and Stone.
Despite Stone's inaccuracy, it shouldn't be completely ignored; should it manage to land, it causes all attacks on the petrified unit to have 100% accuracy and raises the attacker's crit chance. Should Stone land, it will likely be in range of other Shadowshot users, making for a rather unpleasant experience even for units with relatively high Resistance.
As Gorgons are dangerous, it is best to send either a Bishop or Summoner, or both toward the Gorgons. A Summoner will use Phantoms, as monsters always attack Phantoms over any other enemy unit. If one gets damaged, the other will heal them, so make sure to bring a stave to heal each other. Otherwise, send a Berserker or Swordmaster to deal with the Gorgons.