Counter Thingy

[Shock Wave]

Arcane Reversal
UB
Instant

Counter target triggered ability an opponent controls. If a permanent's ability is countered this way, destroy that permanent.
Draw two cards.

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So yeah. I'm not exactly Mr.CardMaker, but I really like this one. I love Teferi's Response, and I think this is an interesting spin-off. I'm thinking that the CC might be better as U1, as UB makes it look kinda unplayable. What say you?

[Polynomial P]

Wow. That is really strong. Teferi's response is hardly played because it is very narrow....but this is almost a universal ability in Vintage:

Oath of Druids
Dark Confidant
Smokestack
Tanglewire
Quiron Dryad
Ichorid/Bridge/Narcomeba Triggers
Necro
Mana Crypt
Mana Vault
Any Storm Card

[Nydaeli]

Too strong, in my opinion.  It's huge card advantage when it works out - an Ancestral Recall of sorts.  I'd reduce it to just a single cantrip, and maybe even have that be contingent on the ability coming from a permanent.

[Shock Wave]

Too strong at UB? What about a cantrip instead of drawing an extra card?