You do not gain any Ability Score increases automatically. Instead, you Ability Scores can increase by choosing to evolve. This will give you 5 points to distribute to your stats; you cannot use more than 2 points on one ability score, and as per usual, the total score cannot be higher than 20.

Starting at 6th level, you gain the option to evolve your Monster. This will change the Monster's physical appearance and give you an Ability Score increase (applied after ability score increases based on class.)

Evolution can only occur a max of 2 times per Monster. To evolve, you must take the action immediately after gaining a level. It does not have to be at level 6; this is just when you gain access to the first evolution. The second time you get access to one is at level 13.

Monsters can only evolve one time upon reaching a new level. The effect of evolution is permanent.

Each Monster has an elemental damage type. This gives them resistance to two types of damage and determines the damage type of their Element Blast.

Flame: Blast does fire damage, resistant to fire and radiant

Frost: Blast does cold damage, resistant to cold and piercing

Storm: Blast does lightning damage, resistant to lightning and thunder

Toxic: Blast does Acid damage, resistant to acid and poison

Mind: Blast does psychic damage, resistant to psychic and force

This attack's damage type is determined by the Element chosen from the table. It is launched at one target and has a range of 100ft.

When using an Element Blast, the target must make a saving throw. The DC for this saving throw equals 8 + your Constitution modifier + your proficiency bonus. A creature takes 2d6 damage on a failed save, and half as much damage on a successful one (rounded down if a decimal.) The damage increases to 3d6 after first evolution and 4d6 after second evolution. You can use this attack 3 times in between long rests.

The way Collectable Monsters are created is shrouded in mystery. As such, it can be hard to determine how old they are from a glance, especially since it doesn't always correlate with if a Monster has evolved. This is made harder by the fact that they're born with some level of intelligence and don't appear to age. All researchers have been able to determine is that they can mature quickly emotionally and mentally; a Monster only a few years old can be considered an adult.

Monsters are typically Lawful and bound to certain rules that govern their existence. This is most easily seen in how they fight, but can also show up in social situations, such as eye contact being a form of aggression. Even villainous Monsters tend to adapt to these rules, and leaders are naturally turned to as a way to keep to this unspoken code.

Basis-level Collectable Monsters are usually as small as a child. However, they can be larger, and as a general rule, evolved Monsters are Medium by default.

Your base walking speed is 30 feet.

Most Collectable Monsters are sapient and can communicate with other races in Common through speech, writing, or other means. Besides that, they can communicate with each other in their own language, Moncode, which they instinctually understand from birth.