Flashing Rottenmouth Viper in with something like Borne Upon a Wind seems wicked, as does blinking it once its down
If youre looking for impactful cards but dont mind waiting a bit for them to resolve, you cant go wrong with these
On the fourth turn he remains in play, he unleashes his signature Mega Flare attack and, as in Final Fantasy X , the summon then leaves the field
That can be a single card youre leaning your whole deck on (but not in a way that falls prey to Counterspell or Prismatic Ending), or it has to be multiple cards with their own massive impact
Hecteyes is among the simplest ways to get some early card advantage, and it gets even better if you ever get to recur or reanimate it
Untapping an attacking creature doesn't remove it from combat