In the form of the Prime Aura.
Jagex’s offerings for Twitch Prime users have historically been rather overpowered, and I say that as someone who has received multiple deposits of tens of millions of gold, high tier gear, and more from Jagex’s Umbral Chests. The latest Twitch item comes in the form of the Prime Aura, an item that boosts experience gain by 10% with the chance to boost gain by 100% at an unknown rate.
The aura lasts 30 minutes and has a 23.5 hour recharge time, meaning people can use it once per day. The pack also comes with 400 Runecoins and 20 treasure hunter keys.
Source: Twitch
MMO Fallout 