Well, this is still a lot of fun to learn & play.

I'm trying to fill out the last 3 cards of my sideboard. I had 2x Blue Elemental Blast and a 2nd Edict, but I think a different 1-mana counterspell would be better now that w6 is gone. Edict was for the prevalence of depths decks, which have showed up much less frequently. Dispel, Spell Pierce, and Flusterstorm come to mind immediately. I am leaning towards Dispel because it can counter Veil of Summer at parity and does much the same as Pyroblast (on the stack.)

Current:
2x ratchet bomb
2x brazen borrower
2x surgical extraction
1x nihil spellbomb
1x liliana, the last hope
1x toxic deluge
2x bitterblossom
1x diabolic edict
3x open