Thats an outrageous bit of value attached to one of your characters and it also protects you against the classic one-two punch of the meta defining ruby-amethyst control deck of set two, which would wipe your board with Be Prepared and then answer the first character you play with a Lady Tremaine which would force you to sacrifice it
Sab-Sunen, Luxa Embodied One of the most powerful cards from the set and also one of the most enigmatic ones, Sab-Sunen, Luxa Embodied is a tough nut to crack
In draft, that is less likely to be the case
Underworld Breach [The Strongest Graveyard Combo Enabler] Underworld Breach turns your graveyard into a second hand for a turn
Plan your attack, develop new tactics, and adapt your plans on the fly As you battle your way to victory
That two energy when it ETBs and the card advantage you gain is a big factor to the call for this 2-drops ban