Notes & Combos
Some brief notes:
--->
I do not think you need to run exactly 40 cards. There is a difference between consistent hands and diverse hands. Although running more than 40 cards will certainly give you more diverse hands, it will not necessarily give you less consistent hands.
--->
I run two Chaos Hunter just because Kashtira is highly represented on the ladder and they have a pretty good matchup against thunder dragons. Thunder dragons do not swarm the board with monsters so Kashtira Fenrir usually gets a lot of value by banishing high value targets. Kashtira Unicorn can also rip Thunder Dragon Colossus out of your extra deck. Chaos Hunter mitigates these possibility.
If Kashtira was less of a presence I would cut it for another Bystial Saronir or Crossout Designator etc, or whatever else you like. You could also go for a third Chaos Hunter if you really want to counter Kashtira.
--->
Chaos angel is a very nice introduction to this deck since, among other things, you have the option of making it in your combo with Batteryman Solar + any bystial.
One example of a two card combo with Batteryman Solar + any bystial:
Normal summon Batteryman Solar and activate the effect to dump Thunder Dragonroar to the GY.
Summon a Bystial by banishing Thunder Dragonroar.
Activate the effect of the banished Thunder Dragonroar to summon a Thunder Dragondark from your deck. (this will activate the effect of Batteryman Solar to spawn a token)
Link the Batteryman Token into Linkuriboh.
Link the Linkuriboh and the Thunder Dragondark into Cross Sheep.
Use Thunder Dragondark's effect to add a Thunder Dragonhawk from your deck.
Use Batteryman Solar and your bystial to summon Chaos Angel into one zone that Cross Sheep points to, BUT DO NOT ACTIVATE CROSS SHEEP YET.
Use Thunder Dragonhawk to summon your banished Thunder Dragonroar.
Tribute your Thunder Dragonroar to summon Thunder Dragon Colossus into the other zone that Cross Sheep points to.
Activate Cross Sheep's effect to summon back Batteryman Solar from your GY and give your monsters 700 atk.
Link of Cross Sheep and Batteryman Solar into Spright Elf, making both Colossus and Chaos and Chaos Angel untargetable.
--->
Finally, although the Chaos Creator is usually a brick if drawn on your first turn, he can be an absolute game winner in the middle game. Remember that he is searchable through your Thunder Dragon Fusion.
GLHF!