Do you think this will play well
Soulflayer doesn't have incidental synergy like many good cube cards, but he gives every other keyworded creature in your cube de facto synergistic which is an extremely charming quality in a card
Its a lord for two mana with flash, already great, and the noncreature counterspell for the cost of a merfolk is a great defensive measure
If Whiplash is no longer on the battlefield when his last triggered ability resolves, use the number of Equipment that were attached to him as he last existed on the battlefield to determine the value of X
Case in point, the Great Henge not only has ways to give you mana and draw cards, its even kind enough to reduce its own casting cost if you have a big enough creature
After Fourth Edition, however, the state of Blue in base sets would spiral away from the standard, eventually leading to the death of the Counterspell, its most powerful weapon for just two Blue Mana