This is dependent on you having creatures, but as long as you have like 3 of them, this will feel really good -- and if you have more it's absolutely insane
It also increases the value of Domri Rade to the point of being one of the better card draw effects you can play assuming you are both reasonbly well sorted for red fixing and are playing a decent creature count
BPhillipYork: This can be broken, there's way to create mana enough to blink this, Dockside Extortionist is an obvious huge mana generator here, but there's also Su-Chi and other sources, you could also do something like sacrificing Gnawing Vermin or Stitchers Supplier and generate a lot of mill, if you were into that sort of thing
it was a strategic move to restore the collectors confidence WotC needed to survive
Second, since Ultra Pro makes sleeves for a ton of different games, there are many different designs available
It's hard to say if double strike is good, but it's still strictly better than regular damage or first strike