(Sorry for probably many mistakes in the grammar, I am German.)
Attributes: Ranged, Mage, Anti-AD
Xixi is hard to catch with weapons within her half-materiality. She takes 35% reduced damage from all basic attacks, including all on-hit-effcts applied by these attacks.
Xixi posesses two ultimate abilities with Dimension Door: Disintegration Beam and Dimension Door: Phaseshift. Therefore, she can level her basic abilites up to rank 6. She gets ultimate points at 6, 7, 11, 12, 16 and 17, but she cannot level any ultimate in a way in which she would have more than +1 level than in her other ultimate.
Dimension Gap: Collapse
COST: 40 Mana
Active: Xixi creates a small explosion in an selected area, dealing magic damage to all enemies hit and silencing them for 1 second.
When Xixi stands within the explosion radius, the cooldown is reduced by 3.5 seconds.
Active: Xixi charges for 0.75 and then unloads a massive, destructive energy beam in a line, dealing true damage to all enemies it strikes. The first enemy champion hit additionally receives bonus damage in relation to his bonus attack damage.
Damage: 200 / 300 / 400 (+ 60% AP)
Bonus Damage: 250% / 325% / 400% enemy Bonus-AD
Dimension Door: Phaseshift
COST: 100 Mana
COOLDOWN: 9 / 8 / 7
Active: Xixi instantly teleports partly into another dimension and becomes untargettable, gaining massively increased movement speed for the duration.
Re-Casting Phaseshift within the next 10 seconds increases the mana-cost by 100 (stacks indefinetly).
When getting untargettable, Xixi will not dodge already fired projectiles, but takes 35% reduced magic damage and is immune to CC effects and other damage types. While in phase, she can cast spells but cannot autoattack.
Total cost of using Phaseshift n times: 100 / 300 / 600 / 1000 / 1500 / 2100 / 2800 / 3600 / 4500 / 5500 / 6600 mana