CR 21 monsters
The 4 monsters of challenge rating 21 in the fifth-edition SRD.
CR 0CR 1/8CR 1/4CR 1/2CR 1CR 2CR 3CR 4CR 5CR 6CR 7CR 8CR 9CR 10CR 11CR 12CR 13CR 14CR 15CR 16CR 17CR 19CR 20CR 22CR 23CR 24CR 30
| Monster | CR | Type | AC / HP | Editions |
|---|---|---|---|---|
| Ancient Black Dragon | 21 | Gargantuan dragon | 22 / 367 | SRD 5.1 SRD 5.2.1 |
| Ancient Copper Dragon | 21 | Gargantuan dragon | 21 / 350 | SRD 5.1 SRD 5.2.1 |
| Lich | 21 | Medium undead | 17 / 135 | SRD 5.1 SRD 5.2.1 |
| Solar | 21 | Large celestial | 21 / 243 | SRD 5.1 SRD 5.2.1 |