The XP Magnet Gene will cause Experience Orbs to be picked up from a greater distance.
By default, every 10 ticks it searches for Experience Orbs in an 8 block radius around the player, and tries to pick them up. Both of these values can be changed in the server config.
It can be disabled by the Anti-Field Block, or by sneaking.
Obtaining
By default, you can get it from these sources:
- Endermite: 3/6