Like multikicker, this additional cost could be paid as many times as caster was able to pay, but can choose new targets
The Battle for Zendikar lands are more or less worthless, selling for somewhere between $0.25 and $0.50, but I expect that you'll have a hard time getting much more than $0.10 on buylist once Double Masters floods the market with supply (although they might have some value as trade throw-ins)
In terms of the Colorless offerings, I would say the ship is ready to set sail
Burning Wish Market Price: $5 Undoubtedly the most impactful cycle to come out of JUD, the "wishes" had a profound effect on competitive formats
For instance, if Eerie Ultimatum is your sorcery of choice, then you just need a graveyard deck (maybe a sacrifice-based one?) and a full graveyard to take advantage of it
Once youve established your curve and battlefield, you can swing quickly and effectively with the next creatures you cast