I've been thinking about
There seems to have been quite a lot of love for
jori en, ruin diver, but not a lot of mention of the assault. It doesn't necessarily need particular support for it to be playable, though I'm posting it in the lower power threat for a reason I guess. It fits in quite well with what you want to be doing a lot of the time anyway, developing mana and drawing cards, but could lead to some interesting sequencing decisions.
It ties in quite nicely with cards that trigger when you play spells, either any spells (
managorger hydra), instants and sorceries (
guttersnipe) or non-creature spells (
abbot of keral keep,
jhessian thief).
Of course there's cantrips and
impulse like effects, but also overlaps with flashback, tutors, regrowths and rebound. Seems like it might be a too expensive/do nothing for aggro, but I guess it depends on how fast your format is and if you have a strong spells matter theme or not. But would be probably be good in midrange and control?