Destiny dice

[Dan.Ford]

I am just double checking this: when using destiny dice for spells and charge rolls, do both dice need to be replaced?  

So, even with the lord of change ability, when he changes the lowest dice to the highest dice value for casting,  I wonder if 2 destiny dice should be used ?

[heywoah_twitch]

At your option you may replace zero, one, or both of the dice for a charge/casting roll.