Most walkers offer a game winning threat, some board control and some value options while Dack only offers one and only some of the time
Like plenty of other Eldrazi, its difficult to reprint these in Standard or accessible sets, so the price tends to drive up as there is always demand for the big Eldrazi
As the set's Bubble Mew (Mew ex SIR) soars above $2,000 in a PSA 10, this card's PSA 10 price sits at roughly half that, leaving plenty of room for Charizard to continue climbing the charts up into new territory
4 ABOMINABLE CHAMBER OF THE UNCHAINED A straightforward enough trap, Abominable Chamber of the Unchained brings out a monster from the hand or graveyard
I think there are at least two other build variations: one focusing on Equipment in the two to four mana range with a lot of efficient instants and sorceries to cast cheaply, and one focusing on maximizing the damage dealing mode