some info:
- there are 3 mutation packs what you can see when look at in game wiki while do run.
- only 2 mutations can be deleted from pool without taking it, its drone and zombie summon.
- when you get to the next biome (except mushroom) there is more chance that you get mutation from this biome, then from previous.
- you cant get same mutation, what you saw before reroll (can after 2).
- each mutation slot, when receiving a mutation, does not take into account the fact that some one may drop into several classes, but if such a one drops out, it randomly selects the class to which this mutation will fall, which leads us to the conclusion that if we take a mutation that can fall into different classes (for example, vampirism) then the mutation pool will not change, but the class pool for this mutation will change
how to use it:
if you have received a mutation that can fall on a very limited number of classes (snake agility, mage gene) but not for your class, selecting this mutation will increase the likelihood that the next same mutation will fall on the class you need.
if you have used all the rerolls, it is better to take a mutation that may drop on one class or a multiclass, then the mutation pool will decrease, and the chance of the mutation you need will slightly increase
if you leave altar opened, other altars won't show you this mutation, so you can use both previous tips for all 3 mutations you see, don't forget to back for those altars!