Instead of playing it safe, black decks trade life, sacrifice creatures, and treat the graveyard like a second hand
If your opponent tries to chump the damage with a weak creature, Zurgo will kill it in the first strike damage step and then deal even more damage on the regular damage step
Retrace (You may cast this card from your graveyard by discarding a land card in addition to paying its other costs.) Changeling is a characteristic-defining ability
For example, if you cast Kytheon, Hero of Akros, you still need to wait a turn to attack
Its certainly unfair with flicker creatures and can lock people out of playing spells and can also get big enough to rule the unfriendly skies
Regardless, it should always be pretty valuable for collectors