This appears to have quite a few targets in cube given the number of legendaries and PW's and at worst it is a slightly more costly Stifle. Will have to breakdown how many targets this has to see if it is worth cubing.
Edit: In my 450 this has 71 targets. It probably isn't going to make the cut even with the Stifle fallback option. Still a card to watch as legendary nonland permanents continue to become more prominent in cube.
Instant (R)
Counter target activated ability, triggered ability, or Legendary Spell.
This appears to have quite a few targets in cube given the number of legendaries and PW's and at worst it is a slightly more costly Stifle. Will have to breakdown how many targets this has to see if it is worth cubing.
Edit: In my 450 this has 71 targets. It probably isn't going to make the cut even with the Stifle fallback option. Still a card to watch as legendary nonland permanents continue to become more prominent in cube.
My High Octane Unpowered Cube on CubeCobra