I'm sort of re-evaluating delver as a deck from "bad" to "potentially not awful" even without this card. I think the restrictions have shaken things up a bit more than I expected.
I think I want to play Chart, and also play more than just 8 creatures with Chart. So a potential shell could be:
2 Mox Monkey??
Monkey Monkey is another 1 drop attacker that also has utility against outcome and shops right now.