Machine Sea Ossuary

Machine Sea Ossuary enters tapped.
When Machine Sea Ossuary is untapped,
all lands are islands unless their controller
pays {p/b}, {p/u}, or {p/w} at the
beginning of their main phase.
Phyrexian creatures you control have island walk.
{t}: Add {b}{u}{w} to your mana pool.
Use only to cast Phyrexian enchantments.
Even in the remnants there lies the
spark of the All Father