I like the fact that this gives Flooding more use, and theme-wise it is pretty creative.
My suggestion would have been to lower casting cost, since the active isn't very cost-efficient (and probably useless vs mono decks).
But then i realized there's the synergy with Trident (and SoFo), and i don't promote complete lockdown cards, because they're not fun for the locked player. Since this could be played first turn with a lucky pillar hand and keep enemy quanta pretty low from that moment on, i actually think the cost is fine if not abit low.