After reviewing the possible strategy around "Thunder Dragon"s and "Twin-Headed Thunder Dragon"s I decided to change the effect of "Thunder Dragon" to:
(ON SUMMON) If this card was not transformed into, Target 1 Thunder or Dragon type monster with 1500 or lower Original ATK your control; transform it into “Thunder Dragon”.
This effect will allow a strategy to Fusion Summon multiple "Twin-Headed Thunder Dragon"s which will be the next card up to implement.
This effect will allow me to implement a Transformation Effect and Transformation Summon.
Also implement "Twin-Headed Thunder Dragon"
(ABILITY) Attacks per Turn: 2
(CONTINUOUS) Increase the Attack Range of this card +1 for every other “Twin-Headed Thunder Dragon” you control.
After reviewing the possible strategy around "Thunder Dragon"s and "Twin-Headed Thunder Dragon"s I decided to change the effect of "Thunder Dragon" to:
(ON SUMMON) If this card was not transformed into, Target 1 Thunder or Dragon type monster with 1500 or lower Original ATK your control; transform it into “Thunder Dragon”.
This effect will allow a strategy to Fusion Summon multiple "Twin-Headed Thunder Dragon"s which will be the next card up to implement.
This effect will allow me to implement a Transformation Effect and Transformation Summon.
Also implement "Twin-Headed Thunder Dragon"
(ABILITY) Attacks per Turn: 2
(CONTINUOUS) Increase the Attack Range of this card +1 for every other “Twin-Headed Thunder Dragon” you control.