I have a couple ideas for exp giveaways.
1) You could create this superpowered mob/npc that would kill someone in one hit and its basically a last man standing thing. No one is allowed to use jutsus except for substitution, bodyflicker, and backstep. Everyone is in an arena and the minute you spawn the mob/npc the event starts and the last person standing gets all da exps.
2) Another event could be like a "Find This Item" type thing, where you spawn in an item and players could run off to go find it and whoever finds it gets exp.
3) Lastly, we could kind of do the opposite of my first suggestion where you make this superpowered mob that cannot kill people in one hit, but had incredible defense and a moderate amount of attack power that a lot of players would have to team up and fight. People from all three villages can enter, but they've gotta be careful as to not kill each other while trying to kill the mob/npc. If you die before the mob.npc is killed you get no exp, and everyone left once the mob/npc has died receives exp.
Any comments or critics are welcomed.
In-Game Name: Flaccid Tacos