Cheri will be a butterfly champion, that starts as a caterpillar into a cocoon into a butterfly. Cheri will be a ranged mage when she reaches level 10 and becomes a butterfly, but will be a melee champion with short ranged abilities during caterpillar and cocoon stages, but once she becomes a butterfly she will be ranged, long ranged abilities, fast, and deadly. Cheri will be a considered a hyper mage for her weak early game, but deadly late game. Also, she will have three rank six abilities.
Caterpillar Stage (R) (Ultimate): (Automatically given at level 1)
While Cheri is a caterpillar she is still growing so her mana costs use 20% more mana, but every time an ability hits a minion, monster, or champion (friendly or enemy) she gains 5 ability power (infinite potential) which will given to her when she becomes a butterfly.
Cocoon Stage (R) (Ultimate): (Automatically upgraded / replaces Caterpillar Stage at level 7)
Cheri becomes a cocoon slowing her movement speed by 25 during this stage, her abilities deal 10% less damage, and other effects are reduced by 10%. While Cheri is a cocoon she is granted 50 bonus armour and magic resistance, additionally a counter will appear and every time Cheri takes damage (there is a 5 second gap between taking damage) in this form the counter goes down by 1 (down to a minimum of zero), this counter does not affect Cocoon Stage at all, but the number that is left will be the permanent bonus armour and magic resistance Cheri will receive when she transforms into a butterfly.
Butterfly Stage (R) (Ultimate): (Automatically upgraded / replaces Cocoon Stage at level 10)
Cheri is now a butterfly granting her bonus ability power based on her Caterpillar Stage and bonus armour and magic resistance based on her Cocoon Stage. Additionally she is granted +20 movement speed (+45 from Cocoon Stage), now ignores all unit collision, her attack range is now increased by +475 (600 total attack range), and abilities have +250 more range. Butterfly Stage is now an active ability granting her the ability to fly which allows Cheri to fly over any terrain / ignore all terrain for the next 5 seconds; no cost, 12 second cooldown.
This is all i'm going to place for now - just wanted to share the idea!