just ideas

i have some ideas which could be implented into abc, problem is i never
saw any of the female heroine anime, so the ideas are only limited to
the ones i know

Holy Grail
version 1 when every hero died once, except for one hero
version 2 when a hero gained a killing spree (5 kills in a row)

the
holy grail will appear in the middle of the map, all heroes will be
fighting in a battle royale>no allies, the victor will get the Holy
Grail

abilities of the Holy Grail

1. grants the hero a high amount of gold
   
2. grants the hero 2 lvl ups
   
3. grants the hero a unique powerful item(have no clue)
   
4. (unlock a hidden ability of the hero, another skill usable at lvl 12)
   
5. increases the attributes of the hero by 50%
   
6. reduces the cooldown of all skills
   
7. change the heroes damage type OR armor type
   
8. grants a global powerful aura to all allies of the victor
   

the event has a cooldown of 240sec
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Book of Eibon (Soul Eater)

the
creeps/heroes have a tiny chance(chance will increase with each lvl of
the murderer?) to drop a page of the book of eibon, each page (which
page it is will be chosen randomly) contains a recipe for a unique item

• grants the wielder spell resis and reduced damage against normal attacks
  
• grants the a powerful cleaving attack with an increased range like 300 Aos
  
• increases the damage of the spells
  

these are only ideas, i know they are not good:D; to build these items you need a high amount of money to buy the ingredients
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Hunger
with
each kill souls will be left and these can be consumed ONLY by heroes
who have a specific item, with each soul the hero consumes his
attributes will be increased BUT the chance that the hero sees no
difference between allies and enemies will also increase EXPONENTIALLY,
he will also infect all around him with madness, the madness will be
intensified the longer they stay near the source

effects of madness
fight less efficient: reduced damage and reduced spelldamage, attack
the one who caused the madness, creeps will fight creature which are not
there IF the madness source is not present