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>according to chrales
Friendship level milestones :
0 : 1000xp, x1 damage
1 : 1 day, 3000xp, x1.03 damage
2 : 7 days, 10 000xp, x1.05 damage, 1 ball, 0.2 discount
3 : 30 days, 50 000xp, x1.07 damage, 2 balls, 0.92 discount
4 : 90 days, 100 000xp, x1.1 damage, 4 balls, 0.96 discount
seems like way too much xp for just being friends and sending gifts around
