The Obsidian Arena - Leveling

0 xp
20 xp: +1 HP/PP
30 xp: +1 HP/PP
40 xp: +1 HP/PP
50 xp: + 1 Weight Capacity
60 xp: +1 HP/PP
80 xp: +1 HP/PP
100 xp: +1 HP/PP - +1 Weight Capacity - [Legendary I]
(Reset XP to 0, add 1 to one of your Base Traits, 100 gold.)
20 xp: +1 HP/PP
40 xp: +1 HP/PP
50 xp: +1 Weight Capacity
60 xp: +1 HP/PP
80 xp: +1 HP/PP
100 xp: +1 HP/PP - +1 Weight Capacity - [Legendary II]
(Reset XP to 0, add 1 to one of your Base Traits, 150 gold)
20 xp: +1 HP/PP
40 xp: +1 HP/PP
50 xp: +1 Weight Capacity
60 xp: +1 HP/PP
80 xp: +1 HP/PP
100 xp: +1 HP/PP - +1 Weight Capacity - [Legendary III]
(Reset XP to 0, add 1 to one of your Base Traits, 250 gold)
30 xp: +1 HP/PP
50 xp: +1 Weight Capacity
60 xp: +1 HP/PP
100 xp: +1 HP/PP - +1 Weight Capacity - [Legendary IV]
(Reset XP to 0, add 1 to one of your Base Traits, 250 gold)
30 xp: +1 HP/PP
50 xp: +1 Weight Capacity
60 xp: +1 HP/PP
100 xp: +1 HP/PP - +1 Weight Capacity - [Legendary V]
(250 gold)

At Each Legendary Rank you achieve, you may also upgrade one of your abilities.
You may not upgrade the same ability Twice.
This allows a maximum of five 'Tier 2 Abilities.'

In Titanium Arena, nothing's different for leveling (now that weight cap has been modified) :P