The Swarmlord The Swarmlord hits the battlefield incredibly hard as a massive threat that replaces itselfand any other creature with counterswhen it dies, which poses a variety of problems for your opponents
Zuko, Exiled Prince Zuko, Exiled Prince, at a minimum, will let you play the top card of your library every time he attacks, thanks to the mana generated via firebending
Vampire Creature Buffers Kazarov, Sengir Pureblood can get stronger with +1/+1 counters during your combat phases or via noncombat damage
With so many tantalising options in the set, theres often a temptation to play around with the cards that mean something to you, rather than ones that are necessarily good
It shuts down a lot of junk, and makes it virtually impossible to block barring something like an indestructible defensive option