|3% chance per rank a slain creature will add zero kills to its Slayer assignment; 2% chance per rank it will add 2 kills.|
|Release date||25 January 2016 (Update)|
|Gizmo type||Weapon, Armour|
Trophy-taker's is an Invention perk that has a chance for each kill on a Slayer assignment to count as either 2 kills or zero. The perk only affects assignments given by Slayer Masters and not normal or Special slayer contracts obtained from Markus outside of the Slayer Tower.
On average, trophy-taker's works out to be a net increase in assignment length. If however you do fewer kills than assigned you will receive fewer slayer points for completing the task.
|Rank||No KC||Double KC||Avg change|
When the perk doubles kill count, it prompts the message "Trophy-taker's perk: this kill has added double to your Slayer task tally." When a kill does not count, it prompts, "Trophy-taker's perk: this kill did not contribute to your Slayer task tally."
The effect of trophy-taker's on task length can be summarised as follows (where is the rank of the perk):
- Chance of a kill counting 0:
- Chance of a kill counting 2:
- Chance of a kill counting 1 (as normal):
This can be combined to give the gross effect of the perk:
i.e. a 1% per rank task length increase. For example, with rank 5 trophy-taker's, a task of 100 will, on average, have 5 remaining after 100 kills.
However, trophy-taker's will also work on the additional kills generated by the perk - from the example above, the 5 remaining on the task will also get a 5% increase, and so on. This means the net effect calculation is infinite, and best represented as a series:
This converges when , which is true for all of our possible values. If you substitute in the possible rank values (1–5), you will get the results in the above table.
|Material||Rarity||Perk ranks with X materials|
|Gizmo layout||Possible perks|
- Even though the patch notes on 22 February 2016 implied that this perk works with Slayer contracts, this is not the case.