As a big fan of dragons, I totally approve the idea. However, this needs a little bit of balancing.
I'll take Butterfly Effect, which is quite similar, as a reference. Like Dragon Power, it may only be used on certain creatures. It grants Destroy with a skill cost of 3

. Destroy does the same as the spell Deflagration | Explosion, which costs 2|1

.
Likewise, some of the skills granted by Dragon Power have an activation cost of 3 and the same effect as a spell which costs 2|1

: Shockwave, Gravity Pull, Fire Lance, Ice Lance and Siphon Life. Deadly Infection is harder to assess because there's no spell with the same effect, but it looks just right. Chaos Gene is a mix of those ones, making it just as good.
On the other hand, Amend is... Well, I don't like the idea, but that's not the main problem. Amend is estimated at 4|3

by egaborg, and I would rather put 5|4. Getting it on a stick for 4 quantas a turn is clearly OP. And Time gets this wonderful Rewind spell, which costs 2|1

, just what you need, and could also be added to the possibilities of Chaos Gene. I'd love using an empowered Silurian Dragon to avoid decking out while keeping my weapon slot free for something else.
Biogenesis is clearly OP as it is ; specify that it may not generate Life Nymphs or Dragons, and it would be balanced imo. And it fits Life very well.
Strengthen and Blessing are too alike. Blessing is nice - albeit probably slightly OP - but the attack bonus of Strengthen does not fit Earth. Heavy Armor (+0/+6) would be more suitable, but somewhat UP. I think that Earthquake, with a cost of 3

, would be OK. By the time you have a dragon out, an earthquake may be much less of a nuisance for your ennemy, but it still compares honorably to Poseidon, because it is mono-element and does not fill your weapon slot.
Summary of suggested changes:Element | Cost | Effect Name | Effect Description |
AIR | 3  | Shockwave | The same as the spell |
DARK | 3  | Siphon Life | The same as the spell. The dragon heals its own HP |
DEATH | 3  | Deadly Infection | Inflict 3 damage per turn to a target creature |
EARTH | 3  | Earthquake | The same as the spell |
FIRE | 3  | Fire Lance | The same as the spell |
GRAVITY | 3  | Gravity Force | The same as the spell |
LIFE | 4  | Biogenesis | Generate random Life creature, except Nymph and Dragon |
LIGHT | 4  | Blessing | The same as the spell |
TIME | 3  | Rewind | The same as the spell |
WATER | 3  | Ice Lance | The same as the spell |
ENTROPY | 3  | Chaos Gene | A random dragon power effect is inflicted on the target (Note: Only Air, Dark, Death, Fire, Gravity, Water and Time dragon effects) |
About the Leaf Dragon joke: since the natural ability of a leaf dragon is Photosynthesis, casting dragon power on it would revert it's skill to Photosynthesis if it had been altered in any way: lobotomize, mutation, liquid shadow, overdrive, mitosis.
Finally, I would like to talk about the casting cost. Butterfly Effect costs 5|4

. Since Quantum Towers produce 3

, cards in "Others" should arguably cost thrice as much for a similar effect. But this is not true because it should also be possible to play this card in a mono deck without spending a dragon-worth of quanta on it. Yet 3|2 is really cheap, something around 6|4 would be more adequate imo.
Well, that's it. Phew
