Many cards have Shift or abilities that rely on certain types and numbers of characters being in play (we're looking at you, Seven Dwarfs)
Mono-Red Aggro aims to win as fast as possible, relying on Hired Claw, Nova Hellkite, and Burst Lightning to rapidly reduce the opponent's life total to zero
Cheshire Cat, From the Shadows has the potential to clear out an opponent in the right circumstances.
The game's creators, recognizing the vast potential of Disney's character library, crafted a game that allows players to engage with their favorite characters in a dynamic and strategic environment
You can also get more benefits along the way, which offsets the fact that your creature will be gone in a few turns
It breaks the turn symmetry by allowing you access to (nearly) all your resources on every other players turn