School of Arcane Zoology

There have been studies on all types of creatures, including Monstrosities. What also fascinates you is not only these creatures but the magic that makes them. You will do what you need to do understand it, including use it.

Test Subject

Use relatively fresh DNA samples of various creature & small amount of your blood, charged with your magic so that will help induce future changes. The creature shares your 
Proficiency Bonus. You decide the Subject's appearance & determine its stats via rolling a D12 for each stat + PB + your mod for that stat. You choose from 3 options the Subject's size, AC, HP, speed, Darkvision range & number of Proficiency. You can only have 1 subject at a time.

For its size, you choose Tiny (you have disadvantage on the roll to determine the subject's STR but it has advantage on Stealth checks), Small or Medium (you have advantage on the roll to determine the subject's STR but it has disadvantage on Stealth checks). 

For its Armor Class, you choose to have an AC of 11 (you have disadvantage on the roll to determine the subject's CHA but it has advantage on Survival & Arcana checks), 14 or 17 (you have advantage on the roll to determine the subject's CHA but it has disadvantage on Survival & Arcana checks). You add DEX MOD to the total

For its Hit Points, you choose to use D6s (you have disadvantage on the roll to determine the subject's CON but it has advantage on Intimidation & Acrobatics checks), D8s or D10 (you have advantage on the roll to determine the subject's CON but it has disadvantage on Intimidation & Acrobatics checks). Its total HP = your wizard level (chosen dice + its CON MOD.)

For its speed, you choose either 20ft (you have disadvantage on the roll to determine the subject's Dex but it has advantage on Investigation & Perception checks), 30ft or 40ft (you have advantage on the roll to determine the subject's DEX but have disadvantage on Investigation & Perception checks). 

For its Darkvision, you choose 30ft (you have disadvantage on the roll to determine the subject's WIS but it has advantage on Athletics & Performance checks), 45ft or 60ft (you have advantage on the roll to determine the subject's WIS but it has disadvantage on Athletics & Performance checks). 

For its skills, you choose 2 Proficiencies (you have disadvantage on the roll to determine the subject's INT but it has advantage on Insight & Nature checks), 3 Proficiencies or 4 Proficiencies (you have advantage on the roll to determine the subject's INT but it has disadvantage on Insight & Nature checks). choose any Proficiency you want.

You have a number evolve points to modify the Test Subject, using them to gain new features, gaining new option (see below). You have 2 + your INT MOD Evolve Points, gaining another point every time you gain a new level in wizard or increase your base INT MOD. You also need a DNA sample of a creature with that feature. You get new options a higher levels.

You can use your Action to give 2 telepathic commands to the Test Subject & your Bonus Action to give 1 telepathic command. Your Subject knows all languages you know. You can make 1 attack per command. Attack roll = 1D20 + DEX + PB, Damage = 1D6 + STR Mod (minimum of 1 damage).

To replace your Test Subject, take a sample of the Subject's DNA, your blood & DNA samples for new features. You then preform a ritual over the course of a long rest & expend a number of spell slots who's levels = your wizard level. These slots do not recharge during this rest.

Level 2. [1 point] +10 ft Darkvision, +10 ft Movement, Swimming Speed (20ft, +10 with repeat selection), Burrowing (20ft, +10 with repeat selection), [point 2] extra Proficiency, 

Level 6. [1 point] Keen Sense (choose 1 sense), [2 points] 1 resistance, 1 condition immunity, 1 language, [3 points] add 1D4 of 1 elemental damage type.

Level 10. [1 point] 1 Condition, Saving Bonus (+1, choose 1 stat, repeatable but increasing cost by 1 per repeat stat) [2point] Blind sight (10ft, +10 with repeat selection), flying (20ft, +10 with repeat selection), speaking, 2 attacks,

Level 14. [2 point] True sight (10ft, +10 with repeat selection), [3 point] 1 Damage Immunity (2 max)

Monstrous Call.

You have advantage on INT, WIS & CHA checks involving Monstrosity. In addition, when you cast Find Familiar, your Familiar can be a Cockatrice, Darkmantle, Gremishka, Pest Mascot, Tressym & Zorbo.

Bond of Blood

You can detect through the Test Subjects senses, not having access to your own senses while using them. Spells you cast can be cast from the Subjects position.

Procreation

You make an Arcana, an Nature, an Animal Handling, an Medicine & a Survival check in a row (dc = 30 - your wizard level). On a success, you create a new creature. After you make a attempt (whether you succeed or not), you can't try again for another week. The new creatures do not share the same bond with you as you Test Subject.