Corrupted Dark Beast is a monster (combat level 258). These are its drops on RuneSpawn, taken from the game’s drop viewer data (how to open the viewer).
OSRS Wiki Where to find this monster and how to fight it are covered on the Corrupted Dark Beast article on the Old School RuneScape Wiki. The drops below are RuneSpawn’s own.
Rates Rates are the base rates for a regular account, before any drop rate bonus. A rarity is shown only where the drop viewer gives one.
Drops
100%
 | Corrupted bowstring | 1 | Always |
 | Corrupted shards | 50-60 | Always |
 | Weapon frame | 1 | Always |
Drops
 | Corrupted teleport crystal | 1 | 1 / 2 |
 | Raw paddlefish | 5 | 1 / 3 |