The player originally has a Grapple Hook. This Grapple Hook shoots with a delay of 3 minutes, on a distance, let’s say, 150 studs. The Gamepass reduces the delay with 50%, and amplifies the distance with 50%. The cost is 75 Robux.
Monsters are attacking players. They deal 25 damage. The Gamepass reduces this damage by 50%. The cost is 50 Robux.
It really depends how big a role these mechanics play in your game. For example, if your game were to be grappling hook simulator, 75 robux would be way too low for the amount of benefits. However, if it were just a side feature, then I’d say it is priced pretty fairly.
The purpose of the game is to fight monsters and get codes that are scattered around the map (short explanation), so the Grapple Hook is an aditional movement mechanic. How about now?