The Warp option lets you stash it early so it re-enters when your hand is ready to spam baubles and rocks
If a noncreature, nonland card is milled this way, create a Blood token. Tokens are good, self-mill is good, this is good
It changes only the amount of combat damage the creature assigns
Its most useful effect is its +1 ability, as it lets you cast spells for free, untapping artifacts and lands after using them
And while were likely to see the non-foils in Ultimate Masters start to drop in price as packs flood the market, there wont be enough of any one Ultimate Box Topper to cause the price to drop by a significant amount
If the exiled Saga doesn't have the listed chapter ability, you won't copy any of its abilities