Cool...reminds me of The Binding of Toad slightly.
For the head rotating (orbiting) you could use that mario enemy that has the black head and electric aura and orbits around posts and such...gosh what was it called let me look it up. EDIT: this thing: http://www.mariowiki.com/amp
On another Mario note you could use the poison pokey head for the poisonous tears. http://www.mariowiki.com/Poison_Pokey
Maybe you could use a 3DS XL for large tears.
For the head rotating (orbiting) you could use that mario enemy that has the black head and electric aura and orbits around posts and such...gosh what was it called let me look it up. EDIT: this thing: http://www.mariowiki.com/amp
On another Mario note you could use the poison pokey head for the poisonous tears. http://www.mariowiki.com/Poison_Pokey
Maybe you could use a 3DS XL for large tears.