(Oodama Rasengan) - Big Ball Spiral Sphere
Dean starts by concentrating his chakra into his right palm,he does so with great precision.He then starts spinning his chakra into multiple directions and at the same time,he makes the chakra denser.This allows the pure chakra to form into a spherical shape and it maintains it.
This time,Dean inserts more chakra and also makes the sphere of chakra denser,thus increasing the sphere in size.This creates a bigger Rasengan with more destructive power
Elemental Rasengan
Dean once again starts focusing his chakra in the palm of his right hand.He then starts spinning his chakra in different directions and also makes his chakra more dense.This gives it a spherical shape,that hovers above Dean's hand.Dean then adds his elemental chakra into said Rasengan,giving it various effects,and thus making it more powerful depending on the situation.
Each effect of elemental infusion:
Katon:
-By adding Fire to the Rasengan,it gives the Rasengan a burning affinity.The fire will allow the Rasengan to be strong against Wind attacks.The Rasengan also increases in power,because it is more powerful at close range and would damage the opponent more.Though what makes this different from the Flame Rasengan?
Suiton:
-By adding the Water affinity to the Rasengan,it gets more destructive and of course,gains the strengths that water has in elemental strengths,and the weaknesses too.
Doton:
-For Doton,I am not entirely sure.Could explain that one please?
Raiton:
-When infusing a rasengan with lightning,it increases it power by making electrically charged.This allows it to shock your opponent,and/or deliver a numbing effect where the rasengan has been hit.
PS: These are all based on what I think,they could all be wrong <_>