Some monsters on the different islands of the game give experience gains for every 100 monsters killed in order to maximize the speed of xp at low levels.
gain xps level x 6,369
gain xps level x 6,369
gain xps level x 23,969
gain xps level x 29,875
gain xps level x 451 800
gain xps level x 524 410
gain xps level x 401 800
For 10 silver keys (dropped by the B'Thastans): Gold level x 1,550; XPs level x 10,750
For 10 Leaf Bracers (dropped by Temporal Protectors): Gold level x 10,750; xps level x 1025
gain xps level x 441 800