* DemonicSpiders: Guaranteed in a game of [[NintendoHard this difficulty]]:
** [[OurDemonsAreDifferent Demons]]. You'll ''need'' [[AntiMagic Lord British's crown]] to stand up to these guys, otherwise [[SummonMagic they'll summon more of their kind]], of whom [[DemonicPossession can possess your characters]]. Even if their powers are nullified, they can still fire projectiles at you, and are very powerful both in numbers and by themselves. [[OurDragonsAreDifferent Dragons]], while stronger and capable of summoning demons, are more so [[BossInMookClothing Bosses in Mook Clothing]] than this trope (and [[VendorTrash they drop valuable goods]], unlike the demons which give squat).
** [[ManiacMonkeys Mong]][[BatOutOfHell bats]], like demons, are [[LightningBruiser powerful]] and fight in large numbers. They thankfully don't have annoying magic spells like demons, but are still overwhelming without using magic.
** The worst of the bunch are the [[TheGuardsMustBeCrazy guards]]. They're [[LightningBruiser quick and powerful]] fighters that band together just like mongbats, except they use ranged weapons, allowing them to stay in place and pummel you before your party can even move. The ones in Lord Blackthorn's castle don't even bother fighting you: they'll just swoop your party away and place it in the torture chamber, where one of your companions is guaranteed to be [[FinalDeath permanently killed off]]. The game makes it so you specifically have to avoid these enemies, rather than face them head-on as you would others.
** The Magic Axe in this installment is by far the most efficient weapon in the game: it has the same range as the Magic Bow, but deals more damage, [[PrecisionGuidedBoomerang doesn't require ammunition]], can also be used for melee combat, and can be carried in one hand. There are only two weapons that deal more damage, of which the Halberd is heavy and two-handed, while the Mystic Sword only works in short range. Walkthroughs swear by this weapon.
** [[AntiMagic Lord British's Crown]]. While it's a necessity when going up against [[OurDemonsAreDifferent demons]] and [[OurDragonsAreDifferent dragons]] [[note]]Both of whom [[SummonMagic can summon more demons]], of which [[DemonicPossession can possess your characters]].[[/note]], it renders every other magic-using enemy completely helpless.
* PortingDisaster: While the previous two games got pretty good (if somewhat limited) NES adaptations, ''this'' game's NES incarnation is a barely-playable trainwreck. Even more shockingly it was developed by Origin themselves, and while it probably makes some sense given that they had never developed for a console before, you'd think they'd care about making a quality product.
* ThatOneAttack: Many of the game's strongest enemies are capable of either [[FlunkyBoss summoning demons ad infinitum]], [[DemonicPossession possessing your party members]], or - in the case of demons themselves - both.