Have a couple of these in sideboard. will need to test it out.
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Definitely! Didn't remember Unwinding Clock. Would be totally worth it with Steel Overseer. @MadPacman, Thanks for the heads up on Urza's. Thought it would help... I'd probably substute them cand the white for splash blue and Etherium Sculptor. Thanks for the comments!
Umm just a note: When blockers are declared, and Ichorclaw Myr is blocked that damage never goes through whether or not you Unsommon or DoomBlade. Once a creature is declared blocked the damage is mitigated unless they have double strike (killing the creature in the FirstStrike phase and then doing the normal combat damage) or the creature has trample. So no, when Ichorclaw Myr is blocked and you Unsummon or Doom Blade, that person does not get 3 direct infect damage.