I'm using a non-official translated version (there is no official one for my language) of the 5e PHB, and checking it with the official one makes me confused.
When you roll damage for a spell, you can spend 1 sorcery point to reroll a number of the damage dice up to your Charisma modifier (minimum of one). You must use the new rolls.
In a practical way, how does it work?
Can I reroll the number of dice up to my Charisma modifier, or only the dice which are lower than my charisma modifier?
Building a scenario
I have a Cha MOD of 5.
I have the following roll:
3d6: 1, 2, 3;
3d8: 4, 5, 7;
2d12: 6, 7;