I think that it would be really cool to have a giant rabbit boss.
it could be summoned by fragrant flowers.
4-sky blue flowers
15 souls of sight
12 souls of night
12 souls of light
the boss could be an enlarged normal bunny sprite and it could be called the beastly bunny.
1st phase it would hop around and try to hurt the player
2nd phase it would hop around and try to hurt the player whilst shooting deadly carrots in the air and directly and would also shoot explosive easter eggs and become faster.
the beastly bunny could be as large as the king slime in width and with the dimensions of a normal bunny and in it's second phase it could look like a corrupt bunny.
1 of the following;
carrot seeds (crimson)
lettuce leaves (corruption)
it will drop one of the following in addition;
it will drop all of the following;
platinum bars 30-80
souls of fright 10-20
hallowed bars 1-50
10% chance to drop;
Beastly Bunny Trophy