Castle Honbuurg Brank

When Castle Honbuurg Brank enters the battlefield, sacrifice two other lands you control otherwise, exile Castle Honbuurg Brank
{t} add {c}{c}{c}{c}{c}{c} to your mana pool
{2} add any color of mana to your mana pool
---"man the wall!!!"
"Why, it'll hold, it's just eldrazi"---