While aftermath looks like other split cards (think Fire // Ice or Breaking // Entering), they don't really play like split cards because you can't cast both halves of the card from your hand
Just being able to pay one mana to access this ability for a turn is incredibly strong, and one that Tidus, Yunas Guardian will certainly be interested in
It can essentially grant a permanent Trailblazers Boots for five mana, but it can also target your opponents creatures, making it a perfect political tool
That's because some creatures naturally work well together: Specters are big fans of discard for instance, while Skeletons like to rise from the grave
It's larger, with better armaments and an advantage in boarding
Kraum's ability looks at the entire turn to determine which spell is a player's second spell