| Mack Mack's Guardian | 120 | | No | | 25% Mind |
| Marsh Light | 8 | | No | Nature | 2% Blunt 2% Pierce 2% Cut 2% Arrow 2% Magic Missile 2% Nature 2% Soul 2% Mind 2% Body 2% Poison 2% Disease |
| Master Blaster | 40 | | Yes | | 10% Pierce 10% Body |
| Mature Gorilla | 96 | | No | Blunt | 20% Blunt 15% Nature 20% Soul -10% Body |
| Mature Wyvern | 94 | Wyvern | No | Pierce | 25% Arrow 25% Nature |
| Medukala Stonegazer | 185 | | Yes | Cut | 50% Blunt 20% Cut 20% Soul 30% Mind -10% Body |
| Meklor the Immovable | 150 | | Yes | | 25% Pierce 25% Cut 40% Arrow |
| Mingor the Merciless | 240 | | Yes | | 20% Pierce 20% Nature 15% Soul -5% Body |
| Minion | | | No | | |
| Minor Storm Giant | 74 | Giant | No | Cut | |
| Minotaur | 40 | Minotaur | No | Cut | |
| Minotaur Destroyer | 125 | Minotaur | No | Blunt | -5% Blunt -5% Pierce -5% Cut 20% Arrow 20% Mind |
| Minotaur Elite | 135 | | No | | 10% Blunt -5% Cut 10% Nature |
| Minotaur Warrior | 120 | | No | Cut | 10% Blunt 10% Arrow -5% Body |
| Mukarramma | | | Yes | Cut | |
| Mukarramma2 | 250 | Dragon | Yes | Pierce | 30% Blunt 75% Soul 25% Mind |
| Mummy | 44 | | No | | 20% Pierce 40% Cut 100% Poison 100% Disease |
| Mystic Crawler | 77 | | No | | 100% Mind 100% Poison |