yin and yang could cost the same element and amount of quanta as the hp of the creature you are targeting.
So for example, using yin and yang on...
a Maxwell's Demon(upped) would cost 5
![Entropy :entropy](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/entropy18x18.png)
a flying Titan would be 70
![Gravity :gravity](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/gravity18x18.png)
an elite armagio would be 30
![Gravity :gravity](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/gravity18x18.png)
a light dragon would be 12
![Light :light](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/light18x18.png)