Corruption of Zendikar

({c} stands for colorless mana)
When Corruption of Zendikar enters the battlefield, all lands become colorless Wastes
that tap for {c} mana.
At the beginning of your upkeep, target creature becomes a 0/1 Eldrazi spawn creature token with "Sacrifice this creature, add {1} to your mana pool.
{2}{c}{c}: Target creature becomes a 0/1 Eldrazi
spawn creature token with "Sacrifice this
creature, add {1} to your mana pool.