Here is some good Watt moster!

[blizzardus]

[Trebuchet MS]

[Dragon / Synchro / Effect]

1 "Watt" Tuner + 1 or more non-Tuner monsters

Once per turn: You can discard 1 "Watt" monster; this card can attack your opponent directly this turn. by disarding one "Watt" monster from your hand. This card gains 200 ATK for each "Watt" monster in your Graveyard. Once per turn: You can send one "Watt" monster from your field you control to the Graveyard, then target to destroy 1 face-up Trap Card your opponent controls; destroy that target.

 

Hmm, let's see. The effort needed to set this card up is a little out there for the Watts. Most of the time they can hit a max of LV7 using 2 base monsters. LV8 will require an intermediate like Wattchimera. At minimum, this card will reach about 3100 ATK when it first shows up, then you discard a Watt monster and hit your opponent directly for 3300. Solid. The Trap Card destruction effect is a little odd, but can perhaps help Watts take down whatever obstructive Continuous Trap that hinders them, if possible.

 

In any case, this card feels a little off with the general Watt theme. They're supposed to all have low base ATK to offset their ability to attack directly and trigger effects when they inflict battle damage. Very few of them exceed 1500 ATK which helps them slide under the Messenger of Peace lock. This stands out like a sore thumb, in addition to the slight difficulty in making it.

[Sir Yamiegg]

Maybe "When this card inflicts Battle Damage to your opponent, you can target 1 face-up Trap card they control; destroy that target?"

[blizzardus]

Here it is guys, what do you say now?

[Progenitor]

Once again, as Gaj said level 8 is not easy to pull of in Watts.  However the Quasar-esk beatdown is pretty cool.  Not sure what the last effect is there for, but you do have to keep the fact that it does something upon inflicting damage....hmmm

 

How about: "Once per turn, when this card inflicts Battle Damage to your opponent: You can banish 1 "Watt" monster from your Graveyard; Destroy 1 face-up card your opponent controls."

That might be a bit much, but there are just so few targets you would commonly see for face-up traps.  Even just changing it to face-up Spells would be better cuz then it could hit pendulums.