Having seen the success this has had in various Mardu, Rakdos, Boros, and even Gruul standard and historic builds, I am going to go ahead and test this one against the consensus here that this is a "win more" card. I would argue this is the best of the legendary artifacts cycle even outperforming The Great Henge and is probably the best cubeable "combat trick" we are going to get for a long time.
hope it does well. To be fair, in those formats, the card is paired with high powered creatures for maximum effect.
Most creatures in my red section struggle to get above 3 power.
The card has over formed my expectations though. Possible the card is cube able.